The bond dissociation energies of X₂, Y₂ and XY are in the ratio of 1 : 0.5: 1. ΔH for the formation of XY is –200 kJ mol–1. The bond dissociation energy of X₂ will be

200 kJ mol^-1

100 kJ mol^-1

400 kJ mol^-1

800 kJ mol^-1

Solution

800 kJ mol^-1

Let B.E of x₂,y₂ and xy are x kJ mol^-1, 0.5 x kJ mol^-1 and x kJ mol^-1 respectively

$\frac{1}{2} x_{2} + \frac{1}{2} y_{2} \to x y; ∆ H = - 200 k J m o l^{- 1} ∆ H = - 200 = Σ (B . E)_{r e a c \tan t} - Σ (B . E)_{p r o d u c t} = [\frac{1}{2} x (x) + \frac{1}{2} x (0.5) x] - [1 x (x)] O n s o l v i n g w e g e t, B . E o f X_{2} = x = 800 k J m o l^{- 1}$

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Thermodynamics

The bond dissociation energies of X₂, Y₂ and XY are in the ratio of 1 : 0.5: 1. ΔH for the formation of XY is –200 kJ mol–1. The bond dissociation energy of X₂ will be

200 kJ mol^-1

100 kJ mol^-1

400 kJ mol^-1

800 kJ mol^-1

Some More Questions From Thermodynamics Chapter

Define intensive properties.

Define extensive properties.

Why all living systems need to be 'open systems'?

Define state variables of a system.

From thermodynamic point of view, to which system the animals and plants belong?

What is a state function?

A thermodynamic state function is a quantity

What is reversible process in thermodynamics?

Define irreversible change.

Name the variable that is kept constant in isochoric process and isobaric process.

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Thermodynamics

The bond dissociation energies of X2, Y2 and XY are in the ratio of 1 : 0.5: 1. ΔH for the formation of XY is –200 kJ mol–1. The bond dissociation energy of X2 will be 200 kJ mol-1 100 kJ mol-1 400 kJ mol-1 800 kJ mol-1

Some More Questions From Thermodynamics Chapter

Define intensive properties.

Define extensive properties.

Why all living systems need to be 'open systems'?

Define state variables of a system.

From thermodynamic point of view, to which system the animals and plants belong?

What is a state function?

A thermodynamic state function is a quantity

What is reversible process in thermodynamics?

Define irreversible change.

Name the variable that is kept constant in isochoric process and isobaric process.

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

The bond dissociation energies of X₂, Y₂ and XY are in the ratio of 1 : 0.5: 1. ΔH for the formation of XY is –200 kJ mol–1. The bond dissociation energy of X₂ will be

200 kJ mol^-1

100 kJ mol^-1

400 kJ mol^-1

800 kJ mol^-1