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The enthalpy of formation of ammonia is ${-46.0 kJ mol}^{-1}$ . The enthalpy for the reaction $2 N_{2 (g)} + 6 H_{2 (g)} \overset{}{\to} 4 {NH}_{3 (g)}$ is______.

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Important Questions on Chemical Thermodynamics and Energetics

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MHT-CET TRIUMPH Chemistry Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 12 - Chemical Thermodynamics and Energetics>Critical Thinking>Q 52

The values of the heat of formation for

{SiO}_{2}

and

MgO

are

- 48.4 kJ

and

- 34.7 kJ

, respectively. The heat of the reaction

2 {Mg}_{(s)} + {SiO}_{2 (s)} \overset{}{\to} 2 {MgO}_{(s)} + {Si}_{(s)}

EASY

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MHT-CET TRIUMPH Chemistry Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 12 - Chemical Thermodynamics and Energetics>Critical Thinking>Q 53

In the combustion of

11 g of {CO}_{2 (g)}, 100 kJ

of heat is liberated. The heat of combustion of

{CO}_{2(g)}

MEDIUM

MHT-CET

IMPORTANT

MHT-CET TRIUMPH Chemistry Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 12 - Chemical Thermodynamics and Energetics>Critical Thinking>Q 54

The heat of formations of

{CO}_{(g)} and {CO}_{2 (g)}

are

- 26.4 kcal

and

- 94.0 kcal

, respectively. The heat of combustion of carbon monoxide will be______.

MEDIUM

MHT-CET

IMPORTANT

MHT-CET TRIUMPH Chemistry Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 12 - Chemical Thermodynamics and Energetics>Critical Thinking>Q 55

In the combustion of

2.0

g

of methane

25

kcal

heat is liberated, heat of combustion of methane would be_____.

EASY

MHT-CET

IMPORTANT

MHT-CET TRIUMPH Chemistry Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 12 - Chemical Thermodynamics and Energetics>Critical Thinking>Q 56

The heat evolved in the combustion of benzene is given by

C_{6} H_{6} + 7 \frac{1}{2} O_{2} \to 6 {CO}_{2 (g)} + 3 H_{2} O_{(l)}; ∆ H = -3264.6 kJ

Which of the following quantities of heat energy will be evolved when

39 g of C_{6} H_{6}

are burnt?

EASY

MHT-CET

IMPORTANT

MHT-CET TRIUMPH Chemistry Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 12 - Chemical Thermodynamics and Energetics>Critical Thinking>Q 57

The

∆_{f}

O_{3}, {CO}_{2}, {NH}_{3}

and

HI

are

+142.2, -393.3, -46.2

and

+25.9 kJ {mol}^{- 1}

, respectively. The order of their increasing stabilities will be

MEDIUM

MHT-CET

IMPORTANT

MHT-CET TRIUMPH Chemistry Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 12 - Chemical Thermodynamics and Energetics>Critical Thinking>Q 58

The heat of atomisation of

{PH}_{3 (g)} is 228 kcal {mol}^{- 1} and that of P_{2} H_{4 (g)} is 355 kcal {mol}^{- 1}

. The energy of the P

-

P bond is _____

HARD

MHT-CET

IMPORTANT

MHT-CET TRIUMPH Chemistry Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 12 - Chemical Thermodynamics and Energetics>Critical Thinking>Q 59

Given the bond energies

N \equiv N

H - H and N - H

bonds are

945

436

and

391 kJ {mol}^{- 1}

, respectively, the enthalpy of the following reaction

N_{2 (g)} + 3 H_{2 (g)} \overset{}{\to} 2 {NH}_{3 (g)}

is______.

The enthalpy of formation of ammonia is -46.0 kJ mol-1. The enthalpy for the reaction 2N2(g)+6H2(g)→4NH3(g) is______.

Important Questions on Chemical Thermodynamics and Energetics

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The enthalpy of formation of ammonia is ${-46.0 kJ mol}^{-1}$ . The enthalpy for the reaction $2 N_{2 (g)} + 6 H_{2 (g)} \overset{}{\to} 4 {NH}_{3 (g)}$ is______.