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

MEDIUM

11th CBSE

IMPORTANT

Earn 100

The heat produced from the complete combustion of $1 g$ of fuel or food is called its .

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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 18

The allotropic form of sulphur for which the standard enthalpy of formation is taken as zero is _____.

MEDIUM

11th CBSE

IMPORTANT

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

Enthalpy of solution of

NaCl (s)

is

+ 4 kJ {mol}^{- 1}

and enthalpy of hydration is

- 784 kJ {mol}^{- 1}

. Lattice enthalpy of

NaCl (s)

will be _____

kJ {mol}^{- 1}

.

MEDIUM

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 7 - Thermodynamics>TEST YOUR GRIP>Q 20

Enthalpy of solution of anhydrous

{CuSO}_{4} (s)

and hydrated salt,

{CuSO}_{4} . 5 H_{2} O (s)

are

- 66.5 kJ {mol}^{- 1}

and

+ 11.7 kJ {mol}^{- 1}

respectively. The enthalpy of hydration of

{CuSO}_{4} (s)

is _____

kJ {mol}^{- 1}

.

MEDIUM

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 7 - Thermodynamics>TEST YOUR GRIP>Q 21

The bond energy of

H_{2}

is found to be

435 kJ {mol}^{- 1}

. Therefore, the enthalpy of formation of hydrogen atom will be _____

kJ {mol}^{- 1}

.

(21.75 / 217.5)

MEDIUM

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 7 - Thermodynamics>TEST YOUR GRIP>Q 22

Enthalpy of dissociation of

H_{2} O

molecules into

H^{+}

and

{OH}^{-}

ions is _____

kJ {mol}^{- 1} .

MEDIUM

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 7 - Thermodynamics>TEST YOUR GRIP>Q 23

For an endothermic process to be spontaneous, the factor

T ∆ S

should be _____

∆ H

in magnitude (equal to or less than or greater than).

MEDIUM

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 7 - Thermodynamics>TEST YOUR GRIP>Q 25

The expression for the entropy change when a gas expands from volume $V_{1}$ to volume $V_{2}$ at constant temperature $T$ is $∆ S_{T} =$ _____.

$(A) R In (\frac{T_{2}}{T_{1}}) . (B) R In (\frac{V_{2}}{V_{1}}) . (C) R In (\frac{V_{1}}{V_{2}}) .$

Enter your correct answer as A, B or C.

MEDIUM

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 7 - Thermodynamics>TEST YOUR GRIP>Q 26

Gibbs' energy equation or Gibbs' Helmholtz equation is_____.

Pick up the correct answer from the following:

A) $∆ G = ∆ H - T ∆ S$ .

B) $∆ G = ∆ H + T ∆ S$ .

C) $∆ G = ∆ H - S ∆ T$ .

D) $∆ G = ∆ S + T ∆ H$ .