Alpha Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>Exercise 1>Q 126

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If $S + O_{2} ⟶ {SO}_{2}$ , $ΔH = - 298.2$ $kJ {mole}^{- 1}$

${SO}_{2} + 1 / 2 O_{2} ⟶ {SO}_{3}$ , $ΔH = - 98.7$ $kJ {mole}^{- 1}$

${SO}_{3} + H_{2} O ⟶ H_{2} {SO}_{4}$ , $ΔH = - 130.2$ $kJ {mole}^{- 1}$

$H_{2} + 1 / 2 O_{2} ⟶ H_{2} O$ , $∆ H = - 287.3$ $kJ {mole}^{- 1}$

the enthalpy of formation of $H_{2} {SO}_{4}$ at $298$ $K$ will be:

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Important Questions on Thermodynamics

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Alpha Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>Exercise 1>Q 127

The values of heat of combustion of ethane

(C_{2} H_{6})

and ethyne

(C_{2} H_{2})

are

- 341

and

- 310

kcal

respectively. Then which of the following is better fuel on mass basis:

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Alpha Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>Exercise 1>Q 128

The enthalpy of combustion of

C_{6} H_{6 (1)}

is

- 3250 kJ .

When

0.39 g

of benzene is burnt excess of oxygen in an open vessel, the amount of heat evolved is

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Alpha Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>Exercise 1>Q 129

The difference between

ΔH

and

ΔE

on a molar basis for the combustion of Methane gas at

T

K

(kelvin) would be:

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Alpha Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>Exercise 1>Q 130

Enthalpy of solution of

NaOH

(solid) in water is

- 41.6 k J m o l^{- 1}

. When

NaOH

is dissolved in water, the temperature of water

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Alpha Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>Exercise 1>Q 131

One mole of anhydrous

{MgCl}_{2}

dissolves in water and liberates

25

cal / mol

of heat.

∆ H_{hydration}

of

{MgCl}_{2} = - 30

cal / mol

. Heat of dissolution of

{MgCl}_{2} . H_{2} O

is:

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Alpha Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>Exercise 1>Q 132

The enthalpy of neutralization of which of the following acid and base is nearly

- 13.6

kcal

?

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Alpha Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>Exercise 1>Q 133

Equal volume of

HCOOH

and

NaOH

are mixed. If '

x

' is the heat of neutralisation of strong acid and strong base, then heat evolved on neutralisation is:

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Alpha Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>Exercise 1>Q 134

If heat of dissociation of

{CHCl}_{2} COOH

is

0.7

kcal / mole

,

ΔH

for the reaction

{CHCl}_{2} COOH + KOH ⟶ {CHC}_{2} COOK + H_{2} O

is: