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States of matter

What happens to the average energy of the molecles in a substance when it is heated

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The average energy transforms.

Posted on Nov 26, 2013

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The water and coils take 7 minutes to get below 32 degrees. The Cycle is only 10 minutes long so the 3 minutes it's below 32 is not long enough to make ice.


You are forgetting about the heat of fusion,
The energy required to change a gram of a substance from the solid to the liquid state without changing its temperature is commonly called it's "heat of fusion". This energy breaks down the solid bonds, but leaves a significant amount of energy associated with the intermolecular forces of the liquid state. It amounts of 80 cal per gram.
Enthalpy of fusion
http://www.kentchemistry.com/links/Energy/HeatFusion.htm
Phase Changes
Latent Heat of Melting of some common Materials

Jun 20, 2015 | Refrigerators

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With a combination of pool products and good preventative maintenance habits, you can improve the heating and energy efficiency of your swimming pool.<br /> <ul> <li><i>Pump Efficiency-</i> You can save energy and maintain a comfortable swimming pool temperature by using a smaller, higher efficiency pump and by operating it less. On average, an energy efficient pump will use 30-45% less energy than that of a standard pump. The difference over a season can be immense. Pumps now come in two-speed, four-speed, and variable-speed models, so you can turn the speed down for regular daily use saving a lot of energy, and use higher settings for more thorough, less frequent cleanings. New energy-efficient pumps also move the water more efficiently for further savings. 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EcoStar is the industry's most energy efficient variable speed pump, thanks to a super-efficient permanent magnet, totally enclosed fan cooled (TEFC) motor and industry leading hydraulic design. Tests prove that EcoStar can save you up to 90% on energy costs compared to ordinary single speed pumps. EcoStar matches pump flow to a pool's needs, versus running at full power 100% of the time. It's fully programmable with a self-contained 24-hour clock and up to 8 custom speed and timer functions that allow EcoStar to manage flow throughout the day. Whether used in new construction or aftermarket applications, EcoStar is the perfect choice.</li><br /> <li>Pentair has a calculator that you can use to <a href="http://www.pentairpool.com/pool-owner/resources/calculators/pool-pump-calc/index.html">calculate your energy savings</a> using an energy efficient pool pump.</li><br /></ul></li> <li><i>Pool Covers-</i> A good pool cover will save energy and water. It can keep the water in your pool an average of 10 degrees warmer, which can cut summertime pool heating costs by up to 90 percent. A cover reduces water and chemical evaporation by up to 70 percent, saving nearly a thousand gallons of water per month. A cover also helps keep your pool clean, which means you'll have to run your filter pump less often, saving even more energy.</li><br /> <li><i>Water temperature efficiency-</i> In addition to a pool cover, there are other ways to help keep the cost of heating your pool to a minimum while you still enjoy a comfortable water temperature. Make use of solar energy by locating your pool in the sunniest part of your yard. If possible, screen it from the cooling, prevailing wind with existing structures such as the house or garage, or add a solidly built fence as a windbreak. The water temperature you desire for your swimming pool not only affects the size of the pool's heater, but also your heating costs if use a gas or heat pump pool heater. Heating your pool with solar energy is by far the most energy-efficient method. If you buy a gas or electric heater, check the yellow-and-black Energy Guide label on the appliance. It shows relative energy-efficiency according to tests by the US Federal Trade Commission (FTC). Pool water temperatures typically range from 78&ordm;F to 82&ordm;F. The energy consumption for each degree rise in temperature will cost 10%-30% more in energy costs, depending on your location. In warmer climates, this percentage is higher because of the relatively low cost of heating a pool at 78&ordm;F.</li><br /> <li><i>Timers-</i> Buy automatic timers for both your pool heater and pump. This will allow you to run them in several short cycles during the day, which is more effective than running them once continuously for several hours a day.</li><br /> <li><i>Preventative Maintenance-</i> Maintain efficient daily operations. Turn down the pool heater when the pool is not in use and maintain appropriate water temperatures when in use (78&deg;-80&deg; for active swimming, 82&deg;-84&deg; for recreational use). Raising the water temperature just 1&deg;F can costs an additional 10 - 30%, depending on your location. Keep a thermometer in the pool to help determine the temperature that is best for your pool and mark the "comfort settings" on the thermostat dial to avoid accidental overheating. Backwash the pool filter only as much as necessary to avoid wasting water and energy and be sure to keep drain systems clear to allow the free flow of water. By far, the most energy efficient lights you can get for the pool are LED or solar powered.</li><br /></ul> Energy Efficiency - Not just for pools! It is also possible to make your spa energy efficient. Portable spas are more energy efficient than in-the-ground spas because they are better insulated and usually have covers. If you have a typical portable spa, your heater will heat water 10 degrees in about 8 hours. If you use your spa once a week, lowering the temperature 3 degrees when not in use will save you approximately 5-10% of your spa heating costs; if you use the spa less often, your savings could be even greater. Don't run the jets unless you are using your spa. The mixture of water and air is great for relaxing the muscles, but it cools the water quickly. Spa covers are important. Be sure to leave the cover on until you are ready to use your spa and replace when you're finished. Remember that the heat that escapes is the heat you must pay to replace.

on Mar 17, 2011 | Pool & Spa

1 Answer

How do the values for total mass before and after reaction demonstrate the law of conservation of matter?


"
  1. The law of conservation of mass, or principle of mass conservation, states that for any system closed to all transfers of matter and energy (both of which have mass), the mass of the system must remain constant over time, as system mass cannot change quantity if it is not added or removed."
In other words matter cannot be created or destroyed, only converted, into heat, energy, work, or other matter.

If your system is not closed (it probably isn't) and mass does not remain equal, then it is most likely that energy was gained or lost by the system. This most likely was in the form of heat.

You will need a pretty good scales to detect this though, as a tiny amount of matter = a huge amount of energy

Jan 22, 2015 | Computers & Internet

1 Answer

What is the measure of the average amount of kinetic energy of the atoms are molecules in a material


The average kinetic energy of a distribution of free non-interacting particles is related to the absolute temperature.Thus the absolute temperature is a measure of the average kinetic energy of the population.

May 09, 2014 | Computers & Internet

8 Answers

What are the benefits of undergoing therapeutic massage therapy?


Benefits of massage:
  • Relieves muscle tension by enhancing blood flow, which causes muscles to relax
  • Decreases inflammation by activating genes that naturally reduce swelling
  • Reduces pain intensity by diminishing bodily substances that create and prolong pain
  • Improves recovery by stimulating mitochondria, the "energy packs" driving cellular function and repair

back-shoulder-massage-cgsm2sgfdrcvq3po105kncjb-3-0.jpg

Nov 06, 2013 | Furniture

1 Answer

What is matter?


Matter is a substance that has inertia and occupies physical space. According to modern physics, matter consists of various types of particles, each with mass and size.
The most familiar examples of material particles are the electron, the proton and the neutron. Combinations of these particles form atoms. There are more than 100 different kinds of atoms, each kind constituting a unique chemical element. A combination of atoms forms a molecule. Atoms and/or molecules can join together to form a compound.
Matter can exist in several states, also called phases. The three most common states are known as solid, liquid and gas. A single element or compound of matter might exist in more than one of the three states, depending on the temperature and pressure. Less familiar states of matter include plasma, foam and Bose-Einstein condensate. These states occur under special conditions.
Different kinds of matter can combine to form substances that may not resemble any of the original ingredients. For example, hydrogen (a gaseous element) and oxygen (another gaseous element) combine to form water (a liquid compound at room temperature). The process of such combination is called a chemical reaction. A chemical reaction involves interactions between the electrons of the atoms, but does not affect the nuclei of the atoms.


I hope you find it very helpful. Best regards.

Aug 16, 2011 | Apple QuickTime VR Authoring Studio 1.0

1 Answer

Define physics


Hi.

(Physics / General Physics) the branch of science concerned with the properties of matter and energy and the relationships between them. It is based on mathematics and traditionally includes mechanics, optics, electricity and magnetism, acoustics, and heat. Modern physics, based on quantum theory, includes atomic, nuclear, particle, and solid-state studies. It can also embrace applied fields such as geophysics and meteorology.



Regards.

Jun 08, 2011 | Computers & Internet

1 Answer

What is chemistry?


Chemistry - is the science of matter and the changes it undergoes. The science of matter is also addressed by physics, but while physics takes a more general and fundamental approach, chemistry is more specialized, being concerned with the composition, behavior (or reaction), structure, and properties of matter, as well as the changes it undergoes during chemical reactions.

- It is a physical science which studies various substances, atoms, molecules, crystals and other aggregates of matter whether in isolation or combination, and which incorporates the concepts of energy and entropy in relation to the spontaneity of chemical processes.

Jun 07, 2011 | Computers & Internet

1 Answer

1994 dishwasher doesn't clean as well as it did a few months ago. Are there filters to clean or service tips? Seems to cycle OK.


Most dishwashers have self cleaning filters which would not require attention unless unusual items or amounts of debris were in the dishwasher. Your most likely problem area would be the holes in the spray arms are plugged with debris.
By the way, the average life of a dishwasher is 9 to 11 years. Newer models are generally quieter and more energy efficient, and many states are just rolling out their government sponsored energy star rebates. (similar to the car " cash for clunkers" program but much less money, and administered by each individual state. These rebates vary by individual states, and will go fast. (where I am, the rebate is $150 for dishwashers and starts March 1. 2010) Might be something to look into.

Feb 05, 2010 | Dishwashers

1 Answer

I want to know how works


To understand this answer, you must first understand you cannot cool anything. Rather, you must remove its heat. You must accept that heat is energy and that energy cannot be destroyed. You must also understand that heat wants to go where it is cool.

An Air Conditioner "cools" by moving heat from one place to another using the ideas represented above..

An A/C compresses a gas into a liquid then sprays that liquid through a small hole where it returns to its former state, a gas. Then this happens, the gs is cold having given up its heat in the spraying process. The air passing over this cold gas (in a tube) passes the heat it contains to that cold pipe which absorbes it and moves it usually to the out of doors where a fan blowing relatively cooler over another set of coils and the heat passes from the hot coil to the cooler air.

From a physics stand point, you cannot destroy energy. In this case, heat is energy and we cannot destroy that energy. But, we can move it from place to place ... and when we move it to the out side, we dulute that energy into the atmosphere.

Oct 12, 2009 | Heating & Cooling

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