Among the following solutions, which two solutions will show 'highest' and 'lowest' increase in temperature on mixing? Assume that initially all solutions at 2 5 ∘ C and density of

Question

Among the following solutions, which two solutions will show 'highest' and 'lowest' increase in temperature on mixing? Assume that initially all solutions at 2 5 ∘ C and density of solutions are identical.

TestHub · Accepted Answer

3. Ans (C,D) Heat of neutralization Q ∝ n acid/base ​ (depends on LR) Δ T ∝ V Solution ​ Q ​ ⇒ Δ T ∝ V Solution ​ n AB ​ ​ n H + ​ n OH ​ − V Solution ​ n/V (A) n 1 ​ = 50 m mol ​ n 2 ​ = 20 ​ m mol ​ 150 mL 20/150 (B) n 1 ​ = 30 m mol ​ n 2 ​ = 15 ​ m mol ​ 100 mL 15/100 (C) n 1 ​ = 6 m mol ​ n 2 ​ = 48 ​ m mol ​ 100 mL 6/100 (lowest) (D) n 1 ​ = 42 m mol ​ n 2 ​ = 72 ​ m mol ​ 100 mL 42/100 (highest) T Final ​ of 4 solutions: D > B > A > C

Chemistry - Thermochemistry Question with Solution | TestHub

Options:(select one or more)

Doubts & Discussion

	$n_{H^{+}}$	$n_{OH}^{-}$	$V_{Solution}$	n/V
(A)	$n_{1} = 50 m mol$	$n_{2} = 20 m mol$	150 mL	20/150
(B)	$n_{1} = 30 m mol$	$n_{2} = 15 m mol$	100 mL	15/100
(C)	$n_{1} = 6 m mol$	$n_{2} = 48 m mol$	100 mL	6/100	(lowest)
(D)	$n_{1} = 42 m mol$	$n_{2} = 72 m mol$	100 mL	42/100	(highest)