Alpha Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>Exercise 1>Q 109

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The enthalpy change for a given reaction at $298 K$ is $- x J {mol}^{- 1}$ ( $x$ being positive). If the reaction occurs spontaneously at $298 K$ , the entropy change at that temperature

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Important Questions on Thermodynamics

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Alpha Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>Exercise 1>Q 110

A reaction has

ΔH = - 33 kJ

and

Δ S = - 58

J/K. This reaction would be

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Alpha Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>Exercise 1>Q 111

$H_{2} O (s) \to H_{2} O (l)$

This phase transition is carried out at constant temp and pressure then work done during the process:

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Alpha Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>Exercise 1>Q 112

At

1

atm

pressure freezing of

n

mole of water liquid

(0 ° C)

to ice

(0 ° C)

then heat transfer:

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Alpha Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>Exercise 1>Q 113

For which of the following change

ΔH \neq ΔE ?

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Alpha Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>Exercise 1>Q 114

2 C + O_{2} \to 2 CO

;

ΔH = - 220

kJ

Which of the following statement is correct for this reaction?

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Alpha Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>Exercise 1>Q 115

In the exothermic reaction the enthalpy of reaction is always:

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Alpha Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>Exercise 1>Q 116

$C (s) + O_{2} (g) ⟶ {CO}_{2} (g)$ ; $ΔH = - 94.3$ $kcal / mol$

$CO (g) + \frac{1}{2} O_{2} (g) ⟶ {CO}_{2} (g)$ ; $ΔH = - 67.4$ $kcal / mol$

$O_{2} (g) ⟶ 2 O (g)$ ; $ΔH = 117.4$ $kcal / mol$

$CO (g) ⟶ C (g) + O (g)$ ; $ΔH = 230.6$ $kcal / mol$

Calculate $ΔH$ for $C (s) ⟶ C (g)$ in $kcal / mol$ .

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Alpha Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>Exercise 1>Q 117

The enthalpy change for the reaction of

5

liter of ethylene with

5

liter of

H_{2}

gas at

1.5

atm

pressure is

ΔH = - 0.5

kJ

. The value of

ΔU

will be: (

1

atm

Lt = 100

J

)