ALL IN ONE ISC Chemistry CLASS 11>Chapter 6 - Thermodynamics>Chapter Practice>Q 10

EASY

11th ICSE

IMPORTANT

Earn 100

How does Hess's law help in calculating the enthalpy change for the conversion of diamond to graphite?

Important Questions on Thermodynamics

HARD

11th ICSE

IMPORTANT

ALL IN ONE ISC Chemistry CLASS 11>Chapter 6 - Thermodynamics>Chapter Practice>Q 11

The enthalpy of formation of

{CH}_{4}, C_{2} H_{6} and C_{4} H_{10}

are

- 74.8, - 84.7

and

- 126.1 kJ {mol}^{- 1}

respectively
Arrange them in the order of their efficiency as fuel per gram (enthalpy of formation of

{CO}_{2} (g)

and

H_{2} O (l)

are -

393.5

and

- 285.8 kJ {mol}^{- 1}

respectively.

EASY

11th ICSE

IMPORTANT

ALL IN ONE ISC Chemistry CLASS 11>Chapter 6 - Thermodynamics>Chapter Practice>Q 12

When

0.532 g

of benzene C.(H.)

(C_{6} H_{6})

boiling point

353 K

, is burnt with excess of oxygen in a constant volume system,

22.3 kJ

of heat is given out. Calculate

∆ H

for the combustion process

(R = 8.31 J K^{- 1} mol - 1)

.

EASY

11th ICSE

IMPORTANT

ALL IN ONE ISC Chemistry CLASS 11>Chapter 6 - Thermodynamics>Chapter Practice>Q 13

Is it possible for any process to have

∆ H = ∆ E

? If yes, state under what conditions? If no, state why not?

EASY

11th ICSE

IMPORTANT

ALL IN ONE ISC Chemistry CLASS 11>Chapter 6 - Thermodynamics>Chapter Practice>Q 14

Calculate the work done when

1.0 mole

of water at

373 K

vaporises against an atmospheric pressure of

1.0

atmosphere. Assume ideal gas behaviour.

EASY

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IMPORTANT

ALL IN ONE ISC Chemistry CLASS 11>Chapter 6 - Thermodynamics>Chapter Practice>Q 15

Height of a hill is a state functions or not and why?

EASY

11th ICSE

IMPORTANT

ALL IN ONE ISC Chemistry CLASS 11>Chapter 6 - Thermodynamics>Chapter Practice>Q 15

Distance travelled in climbing the hill is a state functions or not and why?

EASY

11th ICSE

IMPORTANT

ALL IN ONE ISC Chemistry CLASS 11>Chapter 6 - Thermodynamics>Chapter Practice>Q 15

Energy consumed in climbing the hill is state functions or not and why?

MEDIUM

11th ICSE

IMPORTANT

ALL IN ONE ISC Chemistry CLASS 11>Chapter 6 - Thermodynamics>Chapter Practice>Q 16

Calculate the enthalpy of formation of carbon disulphide given that the enthalpy of combustion of carbon disulphide is

110.2 kJ {mol}^{- 1}

and those of sulphur and carbon are

297.4 kJ

and

394.5 kJ / g

atom respectively.