NEET UG CHEMISTRY MCQ: THERMODYNAMICS

1 Easy

1 of 1

Application +4 | -1

The enthalpies of neutralization of a weak base

\mathrm{AOH}

and a strong base

\mathrm{BOH}

\mathrm{HCl}

are

-12250 \mathrm{cal} / \mathrm{mol}

and

-13000 \mathrm{cal} / \mathrm{mol}

respectively. When one mole of

\mathrm{HCl}

is added to a solution containing 1 mole of

A O H

and 1 mole of

B O H

, the enthalpy change was

-12500 \mathrm{cal} / \mathrm{mol}

. In what ratio is the acid distribution between

A O H

and

B O H

View answer and explanation

Correct option: A

2: 1

Option A (

2: 1

) is correct because the ratio is determined by setting up equations based on the enthalpy changes and solving for the distribution of the acid between the two bases.

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