Contents

- 1 Which has the greatest absolute entropy?
- 2 Which has larger absolute entropy per mole?
- 3 Which has the highest entropy per mole of the substance?
- 4 Which halogen in its standard state has the greatest absolute entropy per mole?
- 5 Which of the following has the smallest standard molar entropy ∆ s?
- 6 What should be the signs of ∆ H and ∆ s for a reaction to be spontaneous at all temperatures?
- 7 Which has least entropy?
- 8 What is the change in entropy when 2.5 mole of water?
- 9 Which substance has the higher entropy?

## Which has the greatest absolute entropy?

From the given option, Ne has the highest entropy due to the following reasons:

- Ne is a gas while all other given option is solid and liquid.
- In the

## Which has larger absolute entropy per mole?

H2O(l) at 350K has larger absolute entropy per mole.

## Which has the highest entropy per mole of the substance?

Solution: Hydrogen being gaseous has highest entropy.

## Which halogen in its standard state has the greatest absolute entropy per mole?

Chlorine gas has the greatest absolute entropy per mole.

## Which of the following has the smallest standard molar entropy ∆ s?

C(diamond) is the substance with the lowest molar entropy.

## What should be the signs of ∆ H and ∆ s for a reaction to be spontaneous at all temperatures?

A spontaneous reaction is one that releases free energy, and so the sign of ΔG must be negative. When ΔH is negative and ΔS is positive, the sign of ΔG will always be negative, and the reaction will be spontaneous at all temperatures.

## Which has least entropy?

Diamond has least entropy due to its crystalline structure.

## What is the change in entropy when 2.5 mole of water?

89 J/K.

## Which substance has the higher entropy?

Explanation: Entropy by definition is the degree of randomness in a system. If we look at the three states of matter: Solid, Liquid and Gas, we can see that the gas particles move freely and therefore, the degree of randomness is the highest.