Reversible expansion of an ideal gas under isothermal and adiabatic conditions are as shown in the figure:
ABIsothermal expansion
ACAdiabatic expansion
Which of the following options is not correct?
1.
2.
3.
4.
Identify the correct statement regarding entropy:
1. | At absolute zero of temperature, the entropy of all crystalline substances is taken to be zero |
2. | At absolute zero of temperature, the entropy of a perfectly crystalline substance is +ve |
3. | At absolute zero of temperature, the entropy of a perfectly crystalline substance is taken to be zero |
4. | At 0 °C , the entropy of a perfectly crystalline substance is taken to be zero |