Question

When a solution of $500mL$ of $2M$ $KOH$ is added to $500mL$ of $2M$ $HCl$, then the rise temperature $T_1$ is noted. When the same experiment is repeated by mixing $250mL$ of each solution, the rise in temperature $T_2$ is noted :

• A. $T_1=T_2$
• B. $T_1=2T_2$
• C. $T_2=2T_1$
• D. $T_1=4T_2$

Answer 1

Answer: (A)

$T_1=T_2$

$\text{Option A is correct.}$

$Q_1=2Q_2$

$1000\times T_1=2\times 500\times T_2$

$\text{Q* = Total volume}$ $\times$ $\text{raise in T}$

$Q_1=1000\times T_1$

$Q_2=500\times T_2$

$T_1=T_2$