Identical Objects in Contact: Energy Transfer and Temperature Change

[gcjdavid]

Homework Statement

Two identical objects A and B are placed in contact with each other. If therml energy is transferred from A to B, then A will have a higher
1) Potential energy
2) Kinetic energy
3) Temperature
4) Pressure

Homework Equations

None.

The Attempt at a Solution

I put option number 4. However, the answer scheme said that the correct answer was 3, which happened to be ridiculous.

 

[Borg]

Homework Statement

Two identical objects A and B are placed in contact with each other. If therml energy is transferred from A to B, then A will have a higher
1) Potential energy
2) Kinetic energy
3) Temperature
4) Pressure

Homework Equations

None.

The Attempt at a Solution

I put option number 4. However, the answer scheme said that the correct answer was 3, which happened to be ridiculous.

Why do you think that Temperature is ridiculous? What do you think that thermal energy is?

 

[gcjdavid]

Thermal energy is supposed to be the amount of heat an object has. If A transfers thermal energy to B, then A would have less thermal energy than B. Thus, A would have a lower temperature than B.

 

[Borg]

Thermal energy is supposed to be the amount of heat an object has. If A transfers thermal energy to B, then A would have less thermal energy than B. Thus, A would have a lower temperature than B.

A can't become colder than B when it's in contact with B. At most, it would reach equilibrium.

However, I don't think the final state is what the question is asking for. From what you wrote, I would think that they want to know the starting conditions. In that case, A has to have a higher starting temperature.

 

[SteamKing]

Thermal energy is supposed to be the amount of heat an object has. If A transfers thermal energy to B, then A would have less thermal energy than B. Thus, A would have a lower temperature than B.

You obviously don't realize that heat flows from hotter objects to colder objects, not the other way around.