1. THe Joule experiment dealt with the equivalence of mechanical and thermal ene

Question

1. THe Joule experiment dealt with the equivalence of mechanical and thermal energies.

WHile the weight is dropping, the fluid is in emchanical motion and the temperature is going up.

During the drop, both thermal and mechanical parts of internal energy exist.

Temperature doesn't go upuntil the weight hits the floor, and equilibrium can be established.

At that time, all energy is thermal.

Comment on these.

2. What does "All temperature and no heat" mean?

3. SH of ice is 0.5 cal/g

SH of water is 1 cal/g

Heat of fusion of ice is 80 cal/g

Heat of vaporization of water is 540 cal/g

calculate the average energies of things like:

Raising the temeprature of ice from -80 to water at 50

Condensing steam to water, and cooling to freezing.

4. PV =nRT

If T is constant, what can you say about PV?

5. Make 1/8 of a mole, given various atmoic weights.

Explanation / Answer

1) As the fliud the dropping from a height its potential energy keeps on changing to kinetic energy as the fluid hits the ground its kinetic energy changes to part of sound energy and heat energy .by the law of conservation of energy.so due to collision of fluid with the floor its heated up .

2)The temperature of an object is directly proportional to the amount of heat energy it contains. And changing the temperature of an object, therefore, means changing the heat energy it contains. But the temperature is also dependant on the object's mass, and a property of the material called the specific heat. Specific heat is the the heat per unit mass that corresponds to a unit temperature (e.g. 1 degree) for the particular material. For example, liquid water's specific heat is 1 calorie per gram per degree celcius, or 1 cal/g?

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