(C) The correct match is $A-II, B-V, C-III, D-I$.Explanations:$(A) \rightarrow II$: For an adiabatic wall,$q = 0$. From the first law of thermodynamic

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(C) The correct match is $A-II, B-V, C-III, D-I$.Explanations:$(A) \rightarrow II$: For an adiabatic wall,$q = 0$. From the first law of thermodynamics,$\Delta U = q + W$,so $\Delta U = W_{ad}$.$(B) \rightarrow V$: For a closed system,both heat $(q)$ and work $(W)$ can be exchanged,following $\Delta U = q - W$ (where $W$ is work done by the system).$(C) \rightarrow III$: For thermally conducting walls,heat exchange occurs. The specific case $\Delta U = -q$ implies work done is zero or specific conditions are met.$(D) \rightarrow I$: In an isothermal reversible expansion,$\Delta T = 0$,therefore $\Delta U = C_V \Delta T = 0$.

Class 11 Chemistry Thermodynamics Mix Examples-Thermodynamics and Thermochemistry

Easy

Match the following:
List-$I$ List-$II$
$(A) \Delta U = W_{ad}$ $I.$ Isothermal reversible expansion
$(B) \Delta U = q - W$ $II.$ Wall is adiabatic
$(C) \Delta U = -q$ $III.$ Thermally conducting walls
$(D) \Delta U = 0$ $IV.$ Isolated system
$V.$ Closed system

The correct answer is

List-$I$	List-$II$
$(A) \Delta U = W_{ad}$	$I.$ Isothermal reversible expansion
$(B) \Delta U = q - W$	$II.$ Wall is adiabatic
$(C) \Delta U = -q$	$III.$ Thermally conducting walls
$(D) \Delta U = 0$	$IV.$ Isolated system
	$V.$ Closed system

AP EAMCET 2019 All AP EAMCET

A
$A$ $B$ $C$ $D$
$V$ $I$ $II$ $III$
B
$A$ $B$ $C$ $D$
$I$ $III$ $II$ $IV$
C
$A$ $B$ $C$ $D$
$II$ $V$ $III$ $I$
D
$A$ $B$ $C$ $D$
$II$ $V$ $I$ $III$

$A$	$B$	$C$	$D$
$V$	$I$	$II$	$III$

$A$	$B$	$C$	$D$
$I$	$III$	$II$	$IV$

$A$	$B$	$C$	$D$
$II$	$V$	$III$	$I$

$A$	$B$	$C$	$D$
$II$	$V$	$I$	$III$

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Thermodynamics

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Mix Examples-Thermodynamics and Thermochemistry

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AP EAMCET 2019 Paper All AP EAMCET years →

The heats of combustion of $CH_4, C_2H_6, C_2H_4$,and $C_2H_2$ at the same temperature are $-212.8, -373.0, -337.0$,and $-310.5 \, Kcal$ respectively. Which of these gases is the best fuel?

Easy

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$5 \, mol$ of an ideal gas at $100 \, K$ are allowed to undergo reversible compression till its temperature becomes $200 \, K$. If $C_v = 28 \, J \, K^{-1} \, mol^{-1}$,calculate $\Delta U$ and $\Delta pV$ for this process. $(R = 8.0 \, J \, K^{-1} \, mol^{-1})$

DifficultJEE MAIN 2019

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Given below are two statements:
Statement $I$: For an ideal gas, heat capacity at constant volume is always greater than the heat capacity at constant pressure.
Statement $II$: In a constant volume process, no work is produced and all the heat withdrawn goes into the chaotic motion and is reflected by a temperature increase of the ideal gas.

MediumJEE MAIN 2026

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Calculate $\Delta H_f^o$ of $SiH_2$ from the following reactions:
$Si_2H_{6(g)} + H_{2(g)} \to 2SiH_{4(g)}, \Delta H = -11.7 \ kJ/mol$
$SiH_{4(g)} \to SiH_{2(g)} + H_{2(g)}, \Delta H = +239.7 \ kJ/mol$
$\Delta H_f^o(Si_2H_{6(g)}) = 80.3 \ kJ/mol$

Medium

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An ideal gas undergoes a cyclic process as shown in the figure.
$\Delta U_{BC} = -5 \ kJ \ mol^{-1}$,$q_{AB} = 2 \ kJ \ mol^{-1}$
$\Delta W_{AB} = -5 \ kJ \ mol^{-1}$,$W_{CA} = 3 \ kJ \ mol^{-1}$
Heat absorbed by the system during process $CA$ is......$kJ \ mol^{-1}$

DifficultJEE MAIN 2018

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Match the following:List-$I$List-$II$$(A) \Delta U = W_{ad}$$I.$ Isothermal reversible expansion$(B) \Delta U = q - W$$II.$ Wall is adiabatic$(C) \Delta U = -q$$III.$ Thermally conducting walls$(D) \Delta U = 0$$IV.$ Isolated system$V.$ Closed systemThe correct answer is

Similar Questions

The heats of combustion of $CH_4, C_2H_6, C_2H_4$,and $C_2H_2$ at the same temperature are $-212.8, -373.0, -337.0$,and $-310.5 \, Kcal$ respectively. Which of these gases is the best fuel?

$5 \, mol$ of an ideal gas at $100 \, K$ are allowed to undergo reversible compression till its temperature becomes $200 \, K$. If $C_v = 28 \, J \, K^{-1} \, mol^{-1}$,calculate $\Delta U$ and $\Delta pV$ for this process. $(R = 8.0 \, J \, K^{-1} \, mol^{-1})$

Calculate $\Delta H_f^o$ of $SiH_2$ from the following reactions:$Si_2H_{6(g)} + H_{2(g)} \to 2SiH_{4(g)}, \Delta H = -11.7 \ kJ/mol$$SiH_{4(g)} \to SiH_{2(g)} + H_{2(g)}, \Delta H = +239.7 \ kJ/mol$$\Delta H_f^o(Si_2H_{6(g)}) = 80.3 \ kJ/mol$

An ideal gas undergoes a cyclic process as shown in the figure.$\Delta U_{BC} = -5 \ kJ \ mol^{-1}$,$q_{AB} = 2 \ kJ \ mol^{-1}$$\Delta W_{AB} = -5 \ kJ \ mol^{-1}$,$W_{CA} = 3 \ kJ \ mol^{-1}$Heat absorbed by the system during process $CA$ is......$kJ \ mol^{-1}$

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Match the following:
List-$I$ List-$II$
$(A) \Delta U = W_{ad}$ $I.$ Isothermal reversible expansion
$(B) \Delta U = q - W$ $II.$ Wall is adiabatic
$(C) \Delta U = -q$ $III.$ Thermally conducting walls
$(D) \Delta U = 0$ $IV.$ Isolated system
$V.$ Closed system

The correct answer is

Calculate $\Delta H_f^o$ of $SiH_2$ from the following reactions:
$Si_2H_{6(g)} + H_{2(g)} \to 2SiH_{4(g)}, \Delta H = -11.7 \ kJ/mol$
$SiH_{4(g)} \to SiH_{2(g)} + H_{2(g)}, \Delta H = +239.7 \ kJ/mol$
$\Delta H_f^o(Si_2H_{6(g)}) = 80.3 \ kJ/mol$

An ideal gas undergoes a cyclic process as shown in the figure.
$\Delta U_{BC} = -5 \ kJ \ mol^{-1}$,$q_{AB} = 2 \ kJ \ mol^{-1}$
$\Delta W_{AB} = -5 \ kJ \ mol^{-1}$,$W_{CA} = 3 \ kJ \ mol^{-1}$
Heat absorbed by the system during process $CA$ is......$kJ \ mol^{-1}$