Pradeep's Chemistry Vol 1>Chapter 7 - Thermodynamics>TEST YOUR GRIP>Q 11

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11th CBSE

IMPORTANT

Earn 100

Given that,

$C + O_{2} \to {CO}_{2}, ∆ H ° = - x kJ$ .

$2 CO + O_{2} \to 2 {CO}_{2}, ∆ H ° = - y kJ$ .

The enthalpy of formation of carbon monoxide will be

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Important Questions on Thermodynamics

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11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 7 - Thermodynamics>TEST YOUR GRIP>Q 12

If the bond energies of

H - H, Br - Br

and

H - Br

are

433 kJ {mol}^{- 1}, 192 kJ {mol}^{- 1}

and

364 kJ {mol}^{- 1}

respectively.

∆ H °

for reaction

H_{2} (g) + {B r}_{2} (g) \to 2 H B r (g)

is

EASY

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 7 - Thermodynamics>TEST YOUR GRIP>Q 13

Predict the sign of

∆ S °

for the following reaction:

2 H_{2} S (g) + 3 O_{2} (g) \to 2 H_{2} O (g) + 2 {SO}_{2} (g) .

MEDIUM

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 7 - Thermodynamics>TEST YOUR GRIP>Q 14

Which one of the following demonstrates a decrease in entropy?

MEDIUM

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 7 - Thermodynamics>TEST YOUR GRIP>Q 15

If the enthalpy change for the transition of liquid water to steam is

30 kJ {mol}^{- 1}

at

27 ° C

, the entropy change for the process would be

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11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 7 - Thermodynamics>TEST YOUR GRIP>Q 16

A catalyst

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11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 7 - Thermodynamics>TEST YOUR GRIP>Q 17

A process is taking place at constant temperature and pressure. Then

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11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 7 - Thermodynamics>TEST YOUR GRIP>Q 18

In an irreversible process taking place at constant

T

and

P

and in which only pressure-volume work is being done, the change in Gibbs free energy

(dG)

and the change in entropy

(dS)

, satisfy the criteria.

HARD

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 7 - Thermodynamics>TEST YOUR GRIP>Q 19

A reaction occurs spontaneously if