1) Select all the processes below that are SPONTANEOUS. Freezing of water at 10°

ID: 1019327 • Letter: 1

Question

1) Select all the processes below that are SPONTANEOUS.

Freezing of water at 10°C

Corrosion of iron metal (rust)

Expansion of gas to fill the available volume

Boiling of gasoline at 25°C and 1 atm pressure

2)Select all the processes below that are SPONTANEOUS.

Freezing of water at -5°C

Dissolving sugar in hot coffee

Compression of a gas from a large volume to a small volume

Uniform mixing of bromine vapor and nitrogen gas

3) Arrange the following in order of increasing entropy (low entropy-1 to high entropy-3)

- 1. 2. 3.

H2O(l) at 80°C

- 1. 2. 3.

H2O(s)

- 1. 2. 3.

H2O(l) at 30°C

Freezing of water at 10°C

Corrosion of iron metal (rust)

Expansion of gas to fill the available volume

Boiling of gasoline at 25°C and 1 atm pressure

1) Select all the processes below that are SPONTANEOUS.

Freezing of water at 10°C = nonspontaneous, Since it is above freezing point

Corrosion of iron metal (rust) This is spontaneous with time, since Iron has a lower potential than H2O + O2 equilibrium

Expansion of gas to fill the available volume = This is spontaneous, accoridng to kinetic gas theory

Boiling of gasoline at 25°C and 1 atm pressure = this is not spontaneous, BP of gasoline is higher

Q2.

2)Select all the processes below that are SPONTANEOUS.

Freezing of water at -5°C : this is spontanoues, since it is below freezing point

Dissolving sugar in hot coffee spontanoues, since sugar is soluble

Compression of a gas from a large volume to a small volume false, this violates entropy increase

Uniform mixing of bromine vapor and nitrogen gas True, in order to make more chaotic mixture, this is spontaneous

solids < liquida

solid < liquid at 30 C < liquid at 80 C

Entropy is a functigon of Temperature

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