NEET UG CHEMISTRY MCQ: THERMODYNAMICS

1 Hard

1 of 1

Application +4 | -1

An ideal gas undergoes isothermal compression from

5\,{m^3}

1\,{m^3}

against a constant external pressure of

4\,N{m^{ - 2}}

. Heat released in this process is used to increase the temperature of 1 mole of

Al

. If molar heat capacity of

Al

24\,J\,mo{l^{ - 1}}\,{K^{ - 1}}

, the temperature of

Al

increases by

View answer and explanation

Correct option: D

\frac{2}{3}K

Option D (2/3 K) is correct because the heat released during isothermal compression is used to increase the temperature of Aluminum, and the temperature increase is calculated using the formula q = nCΔT.

More Questions from THERMODYNAMICS

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The internal energy of one mole of a gas is: An ideal gas is allowed to expand both reversibly and irreversibly in an isolated system. If

{T_i}

is the initial temperature and

{T_f}

is the final temperature, which of the following statements is correct? For which of the process, ∆S is negative? The work done by a weightless piston in causing an expansion ∆V (at constant temperature), when the opposing pressure, P is variable, is given by: Assertion :- At constant pressure of the change

\mathrm{H}_2 \mathrm{O}(\mathrm{s}) \rightarrow \mathrm{H}_2 \mathrm{O}(\mathrm{g})

work done is negative.

Reason :- During phase transition work done is always negative. For the reaction,

\mathrm{X}_2 \mathrm{O_4(l}) \longrightarrow 2 \mathrm{XO}_2(\mathrm{g}), \Delta U=2.1 \mathrm{~kcal}, \Delta S=20 \mathrm{~cal} \mathrm{~K}^{-1}

300 \mathrm{~K}

. Hence,

\Delta G