According to the law, a perfect crystal's entropy is 0 at absolute zero, which is:
1. The first law
2. Second law
3. Third law
4. None of the above
At constant pressure and temperature, the direction of any chemical reaction is one where the...... decrease.
1. Entropy
2. Enthalpy
3. Gibbs energy
4. None of the above
Entropy decreases during:
1. crystallization of sucrose from solution
2. rusting of iron
3. melting of ice
4. vaporization of camphor
Entropy change of vaporization at constant pressure is given by:
1.
2.
3.
4. None of the above
What is the entropy change for the reaction given below,
2H2 (g) + O2 (g) 2H2O(l)
at temperature 300 K? Standard entropies of H2 (g), O2(g) and H2O(l) are 126.6, 201.20 and 68.0 JK-1mol-1 respectively.
1. -318.4 JK-1mol-1 .
2. 318.4 JK-1mol-1
3. 31.84 JK-1mol-1
4. none of these