Gamma Question Bank for Medical Chemistry>Chapter 6 - Thermodynamics>Assignment>Q 46

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The heat of combustion of solid benzoic acid at constant volume is $- 321.3 kJ$ at $27 ° C$ . The heat of combustion at constant pressure is

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Important Questions on Thermodynamics

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Gamma Question Bank for Medical Chemistry>Chapter 6 - Thermodynamics>Assignment>Q 47

$H_{2} (g) + \frac{1}{2} O_{2} (g) ⟶ H_{2} O (ℓ)$

$H_{2} O_{(l)} \to H_{2} O_{(g)}; ΔH = x_{4}$

Given,

$E_{H - H} = x_{1}$

$E_{O = O} = x_{2}$

$E_{O - H} = x_{3}$

${ΔH}_{F}$ of $H_{2} O$ vapour is

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Gamma Question Bank for Medical Chemistry>Chapter 6 - Thermodynamics>Assignment>Q 48

A cylinder contains either ethylene or propylene.

12 ml

of gas required

54 ml

of oxygen for complete combustion. The gas is

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Gamma Question Bank for Medical Chemistry>Chapter 6 - Thermodynamics>Assignment>Q 49

The specific heat of a gas is found to be

0.075

calories at constant volume and its formula wt is

40

. The atomicity of the gas would be

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Gamma Question Bank for Medical Chemistry>Chapter 6 - Thermodynamics>Assignment>Q 50

H (g) + O (g) \to O - H (g)

;

ΔH

for this reaction is

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Gamma Question Bank for Medical Chemistry>Chapter 6 - Thermodynamics>Assignment>Q 51

Energy required to dissociate

4 g

of gaseous

H_{2}

into free gaseous atoms is

872 kJ

at

25 ° C

. The bond energy of

H - H

bond will be

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Gamma Question Bank for Medical Chemistry>Chapter 6 - Thermodynamics>Assignment>Q 52

The dissociation energy of

{CH}_{4} (g)

is

360 {kcalmol}^{- 1}

and that of

C_{2} H_{6}

(

g

) is

620 {kcalmol}^{- 1}

. The

C - C

bond energy

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Gamma Question Bank for Medical Chemistry>Chapter 6 - Thermodynamics>Assignment>Q 53

The enthalpy of reaction,
$2 HC \equiv CH + 5 O_{2} \to 4 {CO}_{2} + 2 H_{2} O$
If the bond energies of $C - H, C \equiv C, O = O, C = \bar{U}$ and $O - H$ bonds are $p, q, r, s, t$ respectively

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Gamma Question Bank for Medical Chemistry>Chapter 6 - Thermodynamics>Assignment>Q 54

Using bond energy data, calculate heat of formation of isoprene
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Given $C - H, H - H, C - C, C = C$ and $C (s) \to C (g)$ respectively. as $98.8 kcal, 104 kcal, 83 kcal, 147 kcal, 171 kcal$