MCQ
The enthalpy of solution of $BaC{l_2}(s)$ and $BaC{l_2}.2{H_2}O(s)$ are $ - 20.6$ and $8.8\,kJ\,mo{l^{ - 1}}$ respectively. The enthalpy change for the reaction $BaC{l_2}(s) + 2{H_2}O \to $ is......$kJ$
  • A
    $29.4 $
  • B
    $-11.8$
  • C
    $-20.6$
  • $-29.4$

Answer

Correct option: D.
$-29.4$
(d)$ - 20.6 - 8.8\,KJ\,mo{l^{ - 1}} = - 29.4\,\,kJ$.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

$Ph-CH = NO_2H \xrightarrow[{3days}]{{isomerises}}\mathop {(x)}\limits_{(50 - 50\% )}$ , Isomer $(x)$ is
Carbongene has $X\%$ of $CO_2$ and is used as an antidote for poisoning of $Y.$ Then, $X$ and $Y$ are
Given that the abundances of isotopes ${ }^{54} \mathrm{Fe},{ }^{56} \mathrm{Fe}$ and ${ }^{57} \mathrm{Fe}$ are $5 \%, 90 \%$ and $5 \%$, respectively, the atomic mass of $\mathrm{Fe}$ is
The absolute configuration of
In ionisation of hydrogen, the energy required is ............... $\mathrm{eV}$
If ${K_{sp}}$ for $HgS{O_4}$ is $6.4 \times {10^{ - 5}},$ then solubility of the salt is
Find the value of $\frac {P}{k_p}$ for reaction at a certain temperature is :-

$2NOBr(g)\,\,\rightleftharpoons  \,\,2NO(g)\,\,+\,\,Br_2(g),$  where $P$  is the total pressure of gases at equilibrium and $P_{Br_2}\,\,=\,\,\frac {P}{9}$

Number of products
The intermediate during the addition of $HCl$ to propene in the presence of peroxide is
The entropy versus temperature plot for phases $\alpha$ and $\beta$ at 1 bar pressure is given. $S_{\mathrm{T}}$ and $S_0$ are entropies of the phases at temperatures $\mathrm{T}$ and $0 \mathrm{~K}$, respectively.

(image)

The transition temperature for $\alpha$ to $\beta$ phase change is $600 \mathrm{~K}$ and $C_{p, \beta}-C_{p, \alpha}=1 \mathrm{~J} \mathrm{~mol}^{-1} \mathrm{~K}^{-1}$. Assume $\left(C_{p, \beta}-C_{p, \alpha}\right)$ is independent of temperature in the range of 200 to $700 \mathrm{~K} . \mathrm{C}_{p, \alpha}$ and $C_{p, \beta}$ are heat capacities of $\alpha$ and $\beta$ phases, respectively.

($1$)The value of entropy change, $\mathrm{S}_\beta-\mathrm{S}_\alpha$ (in $\mathrm{J} \mathrm{mol}^{-1} \mathrm{~K}^{-1}$ ), at $300 \mathrm{~K}$ is. . . . . . .

[Use : $\ln 2=0.69$  Given : $S_\beta-S_\alpha=0$ at $\left.0 \mathrm{~K}\right]$

($2$) The value of enthalpy change, $\mathrm{H}_\beta-\mathrm{H}_\alpha$ (in $J$ mol ${ }^{-1}$ ), at $300 \mathrm{~K}$ is

Give the answer quetion ($1$) and ($2$)