Which quantity out of ∆ r G and ∆ r G ∘ will be zero at equilibrium?

The relation between ∆ r G and ∆ r G ∘ (standard Gibb's free energy) of a reaction is as follows: ∆ r G = ∆ r G ∘ + RT ln K and, where, K is the equilibrium constant. At equilibrium, ∆ r G becomes zero and the standard Gibb's free energy becomes: Δ r G ∘ = - RT lnK .

EASY

11th CBSE

IMPORTANT

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The molar enthalpy of vapourisation of acetone is less than that of water. Why?

Important Questions on Thermodynamics

MEDIUM

11th CBSE

IMPORTANT

NCERT Exemplar Chemistry - Class 11>Chapter 6 - Thermodynamics>Short Answer Type>Q 35

Which quantity out of

∆_{r} G

and

∆_{r} G^{\circ}

will be zero at equilibrium?

EASY

11th CBSE

IMPORTANT

NCERT Exemplar Chemistry - Class 11>Chapter 6 - Thermodynamics>Short Answer Type>Q 36

Predict the change in internal energy for an isolated system at constant volume.

MEDIUM

11th CBSE

IMPORTANT

NCERT Exemplar Chemistry - Class 11>Chapter 6 - Thermodynamics>Short Answer Type>Q 37

Although heat is a path function but heat absorbed by the system under certain specific conditions is independent of path. What are those conditions? Explain.

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11th CBSE

IMPORTANT

NCERT Exemplar Chemistry - Class 11>Chapter 6 - Thermodynamics>Short Answer Type>Q 38

Expansion of a gas in a vacuum is called free expansion. Calculate the work done and the change in internal energy when

1

litre of ideal gas expands isothermally into vacuum until its total volume is

5

litre?

MEDIUM

11th CBSE

IMPORTANT

NCERT Exemplar Chemistry - Class 11>Chapter 6 - Thermodynamics>Short Answer Type>Q 39

Heat capacity

(C_{p})

is an extensive property but specific heat

(c)

is an intensive property. What will be the relation between

C_{p}

and

c

for

1

mol of water?

MEDIUM

11th CBSE

IMPORTANT

NCERT Exemplar Chemistry - Class 11>Chapter 6 - Thermodynamics>Short Answer Type>Q 40

The difference between

C_{p}

and

C_{v}

can be derived using the empirical relation

H = U + pV

. Calculate the difference between

C_{p}

and

C_{v}

for

10

moles of an ideal gas.

MEDIUM

11th CBSE

IMPORTANT

NCERT Exemplar Chemistry - Class 11>Chapter 6 - Thermodynamics>Short Answer Type>Q 41

If the combustion of

1 g

of graphite produces

20.7 kJ

of heat, what will be molar enthalpy change? Give the significance of sign also.

MEDIUM

11th CBSE

IMPORTANT

NCERT Exemplar Chemistry - Class 11>Chapter 6 - Thermodynamics>Short Answer Type>Q 42

The net enthalpy change of a reaction is the amount of energy required to break all the bonds in reactant molecules minus amount of energy required to form all the bonds in the product molecules. What will be the enthalpy change for the following reaction.

$H_{2} (g) + {Br}_{2} (g) \to 2 HBr (g)$

Given that Bond energy of $H_{2}, {Br}_{2}$ and $HBr$ is $435 kJ {mol}^{- 1}, 192 kJ {mol}^{- 1}$ and $368 kJ {mol}^{- 1}$ respectively.

The molar enthalpy of vapourisation of acetone is less than that of water. Why?

Important Questions on Thermodynamics

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