Chapter 15, Problem 15Q

To determine

Give some examples that obey the first law of thermodynamics but not the second.

Answer to Problem 15Q

Solution:

There are several processes that obey the first law of thermodynamics but violate the second law a few of them are mentioned below.

Explanation of Solution

Some examples that obey the first law of thermodynamics but not the second are:

1. A cup of tea gets warm by obtaining the thermal energy from the air molecules around it.
2. When popcorns are placed in refrigerator they un-pop when cooled.
3. A football on a field starts rolling after gathering the energy from its surrounding.
4. House gets warmer in the winters because heat from outside moves inside the room.

Conclusion:

Examples that obey the first law of thermodynamics but not the second has been discussed above.