give an example where no heat is transferred or from a system but the temperature of the system changes?

Question

b) why is it wrong to think of heat as a form of stored energy?

Answer 1

Sounds like a chemical reaction to me. Add Sodium metal to water.

Answer 2

Change the pressure of a gas. The equation PV=nRT or I beleive charles law where volume over temperature equales a constant. change the volume, the temperature changes but there was no heat transfer between the system.

B.) Heat is just the movement of molecules between two systems, it has nothing to do with the ammoutn of energy in the system but how fast energy moves in the system.

Answer 3

Isothermal means constant temperature. Adiabatic means no heat transfer. These two are very different statements. You can have an adiabatic process with a change in temperature and you can have an isothermal process that has heat transfer. In the special case of no work, you can also have an adiabatic process with no change in temperature (the example we did in class of the free expansion).

There are some thermodynamic processes in which there is no heat transfer. Engineers call this type of a process an adiabatic process and there are simple equations which relate the pressure and temperature of a gas for an adiabatic process.

Answer 4

Any adiabatic system has this characteristic. Many accessible examples are found in systems that change very quickly, which approximates an adiabatic cycle, because no heat can dissipate in such a short frame of time.

Answer 5

You can get a change in temperature by increasing or decreasing pressure. For example, ice actually gets colder when it is compressed.