NEET UG CHEMISTRY MCQ: THERMODYNAMICS

1 Hard

1 of 1

Analyzing +4 | -1

Heat of neutralization of a strong acid

H A

and a weaker acid

H B

with

K O H

are -13.7 and

-12.7 \mathrm{K} \mathrm{cal} \mathrm{mol}^{-1}

. When 1 mole of

\mathrm{KOH}

is added to a mixture containing 1 mole each of

H A

and

H B

, the heat changes was

-13.5 \mathrm{K}

cal. In what ratio is the base distributed between

H A

and

H B

View answer and explanation

Correct option: C

4: 1

Option C (4:1) is correct because it represents the ratio in which KOH is distributed between the strong acid HA and the weak acid HB, calculated using the given heats of neutralization.

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