Entropy of a system can never decrease

[shenwei1988]

heat! so hard.

true or false


1.The entropy of a system can never decrease

2.All Carnot engines are reversible

3.It is impossible have a net transfer of heat from a cold reservoir to a warm reservoir

4.A refrigerator lowers the entropy of the volume inside

5.If the temperature of the cold reservoir increases with the temperature of the hot reservoir unchanged, the efficiency of a Carnot engine will increase

6.Adiabatic expansion will lower the temperature of a gas

7.Any process that includes adding heat to an ideal gas will increase the entropy of the gas

8.All Carnot engines are more efficient than all real engines

 

[robertm]

No one will do your work for you.

If you have a genuine interest in knowing the answer to these questions you must show that you have actually thought about them, also ask them one or two at a time with effort given on each. Good luck.