Theromodynamics...

For the reaction 
X₂O₄ (η) →2XO₂ (g) ΔE = 2.1 kcal, 
ΔS = 20 cal/K at 300 K. Hence ΔG is–

When one mole of uni-univalent salt AB is dissolved in water at 300 K, 3.7 kJ of heat is absorbed but ΔG of the process is – 8.3 kJ. What is the value of ΔS for the dissolution process ?

Which of the following process/es proceed towards more disordered state? 
I. stretching the 
II. Sublimation of rubber dry ice 
III. Crystallisation of 
IV. dissolution of salt from solution sugar from solution

When ice melts into water, entropy -

In which of the following reactions ΔS is positive?