NEET UG CHEMISTRY MCQ: THERMODYNAMICS

1 Hard

1 of 1

Analyzing +4 | -1

A solution of

500 \mathrm{~ml}

2 \mathrm{~M}-{KOH}

is added to

500 \mathrm{~ml}

2 \mathrm{~M}-{HCl}

and the mixture is well shaken. The rise in temperature

T_1

is noted. The experiment is again performed using

250 \mathrm{~ml}

{KOH}

solution and

500 \mathrm{~ml}

{HCl}

solution and rise in temperature

T_2

is again noted. Which of the following is correct?

View answer and explanation

Correct option: D

T_1

is 1.5 times as larger as

T_2

Option D (

T_1

is 1.5 times as larger as

T_2

) is correct because the amount of heat released in the first experiment is 1.5 times that of the second experiment, leading to a temperature rise that is 1.5 times greater.

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