(B) To obtain the target reaction $B + D \rightarrow E + 2C$,we manipulate the given equations:$1. \ 2 \times (I): A \rightarrow 2B, \Delta H = 2 \tim

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(B) To obtain the target reaction $B + D \rightarrow E + 2C$,we manipulate the given equations:$1. \ 2 \times (I): A \rightarrow 2B, \Delta H = 2 \times 150 = 300 \ kJ/mol$$2. \ (II): 3B \rightarrow 2C + D, \Delta H = -125 \ kJ/mol$$3. \ -(III): 2D \rightarrow E + A, \Delta H = -350 \ kJ/mol$Adding these equations:$(A + 3B + 2D) \rightarrow (2B + 2C + D + E + A)$Simplifying by canceling common terms ($A$ and $2B$ and $D$ from both sides):$B + D \rightarrow E + 2C$$\Delta H = 300 - 125 - 350 = -175 \ kJ/mol$

Class 11 Chemistry Thermodynamics Heat of reaction, Bond energy and Hess law

Medium

Consider the following processes:

Process $\Delta H \ (kJ/mol)$

$I. \ \frac{1}{2} A \rightarrow B$ $+150$

$II. \ 3B \rightarrow 2C + D$ $-125$

$III. \ E + A \rightarrow 2D$ $+350$

For $B + D \rightarrow E + 2C, \Delta H$ will be ............. $kJ/mol$

Process	$\Delta H \ (kJ/mol)$
$I. \ \frac{1}{2} A \rightarrow B$	$+150$
$II. \ 3B \rightarrow 2C + D$	$-125$
$III. \ E + A \rightarrow 2D$	$+350$

AIPMT 2011 All AIPMT

A
$525$
B
$-175$
C
$-325$
D
$325$

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Class 11 Questions

Class 11

Chemistry Questions

Chapter

Thermodynamics

Subtopic

Heat of reaction, Bond energy and Hess law

Previous Year

AIPMT 2011 Paper All AIPMT years →

If the standard molar enthalpy change for combustion of graphite powder is $-2.48 \times 10^{2} \ kJ \ mol^{-1}$,the amount of heat generated on combustion of $1 \ g$ of graphite powder is $..... \ kJ$.
(Nearest integer)

MediumJEE MAIN 2021

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Given the following thermochemical equations:
$C_{(s)} + O_{2_{(g)}} \to CO_{2_{(g)}} + 94.2 \, kcal$
$H_{2_{(g)}} + \frac{1}{2} O_{2_{(g)}} \to H_2O_{(l)} + 68.3 \, kcal$
$CH_{4_{(g)}} + 2O_{2_{(g)}} \to CO_{2_{(g)}} + 2H_2O_{(l)} + 210.8 \, kcal$
Calculate the heat of formation of methane in $kcal$.

Medium

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The heat of combustion of carbon monoxide at constant volume and at $17 \ ^oC$ is $-283.3 \ kJ$. Calculate its heat of combustion at constant pressure in $kJ$. $(R = 8.314 \ J \ K^{-1} \ mol^{-1})$ (in $.5$)

Medium

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Calculate the enthalpy of formation of nitric oxide $(NO)$ in $kJ \, mol^{-1}$ from the following data:
$NO_{(g)} + CO_{(g)} \rightarrow \frac{1}{2} N_{2(g)} + CO_{2(g)}; \Delta H^o = -372.2 \, kJ \, mol^{-1}$
$\Delta H_f^o (CO) = -110.5 \, kJ \, mol^{-1}$
$\Delta H_f^o (CO_2) = -393.5 \, kJ \, mol^{-1}$

Medium

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If the bond energies of $H-H$,$Br-Br$ and $H-Br$ are $433$,$192$ and $364 \ kJ \ mol^{-1}$ respectively,the $\Delta H^o$ for the reaction,$H_{2(g)} + Br_{2(g)} \to 2HBr_{(g)}$ is.....$kJ$

MediumAIPMT 2004

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Consider the following processes: Process $\Delta H \ (kJ/mol)$ $I. \ \frac{1}{2} A \rightarrow B$ $+150$ $II. \ 3B \rightarrow 2C + D$ $-125$ $III. \ E + A \rightarrow 2D$ $+350$ For $B + D \rightarrow E + 2C, \Delta H$ will be ............. $kJ/mol$

Similar Questions

If the standard molar enthalpy change for combustion of graphite powder is $-2.48 \times 10^{2} \ kJ \ mol^{-1}$,the amount of heat generated on combustion of $1 \ g$ of graphite powder is $..... \ kJ$.(Nearest integer)

Given the following thermochemical equations:$C_{(s)} + O_{2_{(g)}} \to CO_{2_{(g)}} + 94.2 \, kcal$$H_{2_{(g)}} + \frac{1}{2} O_{2_{(g)}} \to H_2O_{(l)} + 68.3 \, kcal$$CH_{4_{(g)}} + 2O_{2_{(g)}} \to CO_{2_{(g)}} + 2H_2O_{(l)} + 210.8 \, kcal$Calculate the heat of formation of methane in $kcal$.

The heat of combustion of carbon monoxide at constant volume and at $17 \ ^oC$ is $-283.3 \ kJ$. Calculate its heat of combustion at constant pressure in $kJ$. $(R = 8.314 \ J \ K^{-1} \ mol^{-1})$ (in $.5$)

If the bond energies of $H-H$,$Br-Br$ and $H-Br$ are $433$,$192$ and $364 \ kJ \ mol^{-1}$ respectively,the $\Delta H^o$ for the reaction,$H_{2(g)} + Br_{2(g)} \to 2HBr_{(g)}$ is.....$kJ$

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Consider the following processes:

Process $\Delta H \ (kJ/mol)$

$I. \ \frac{1}{2} A \rightarrow B$ $+150$

$II. \ 3B \rightarrow 2C + D$ $-125$

$III. \ E + A \rightarrow 2D$ $+350$

For $B + D \rightarrow E + 2C, \Delta H$ will be ............. $kJ/mol$

If the standard molar enthalpy change for combustion of graphite powder is $-2.48 \times 10^{2} \ kJ \ mol^{-1}$,the amount of heat generated on combustion of $1 \ g$ of graphite powder is $..... \ kJ$.
(Nearest integer)