Download App

5. Thermodynamics and thermochemistry — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistry5. Thermodynamics and thermochemistry1 Mark
MCQ
For $CaC{O_3}(s)$ $\rightleftharpoons$ $CaO(s) + C{O_2}(g)$ at ${977\,^o}C$; $\Delta H = 176$ $kJ \,\,mol$, then $\Delta E$ is ............. $\mathrm{kJ}$
  • A
    $180$
  • B
    $186.4$
  • ✓
    $165.6$
  • D
    $160$
✓

Answer

Correct option: C.
$165.6$
(c) $\Delta n = 1 - 0 = 1$

$\Delta E = \Delta H + \Delta nRT$

$\Delta E = + 176 - 1 \times \frac{{8.314}}{{1000}} \times 1240 = 165.6\,kJ.$

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

Explore more

More "M.C.Q (1 Marks)" from 5. Thermodynamics and thermochemistry→5. Thermodynamics and thermochemistry — all question types→Chemistry STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

The suitable expression for the equilibrium constant of the reaction $2N{O_{(g)}} + C{l_{2(g)}}$ $\rightleftharpoons$ $2NOC{l_{(g)}}$ is
→
Strongest acid is
→
The two substances $A$ and $B$ are in equilibrium with $C$ and $D$ as $2A + B \rightleftharpoons 3C + 2D$ if the initial pressure of $A$ and $B$ in the ratio of $4 : 1$ and at equilibrium partial pressure of $A $and $D$ are equal. Find the correct relation
→
The expression for Bohr's radius of an atom is
→
The shapes of $XeF_4 , XeF^-_5$ and $SnCl_2$ are
→
Cathode rays are deflected by:
→
Which of the following statement(s) is/are correct?

$(A)$ The $pH$ of $1 \times 10^{-8}\,M\,HCl$ solution is $8$.

$(B)$ The conjugate base $H _2 PO _4^{-}$is $HPO _4{ }^{2-}$.

$(C)$ $K _{ w }$ increases with increase in temperature.

$(D)$ When a solution of weak monoprotic acid is titrated against a strong base at half neutralisation point, $pH =\frac{1}{2} pK _{ a }$

Choose the correct answer from the option given below.

→
The dissociation constant of a substituted benzoic acid at $25^{\circ} \mathrm{C}$ is $1.0 \times 10^{-4}$. The $\mathrm{pH}$ of a $0.01 \ \mathrm{M}$ solution of its sodium salt is
→
The $\mathrm{pH}$ of an aqueous solution containing $1 \mathrm{M}$ benzoic acid $\left(\mathrm{pK}_{\mathrm{a}}=4.20\right)$ and $1 \mathrm{M}$ sodium benzoate is 4.5 . The volume of benzoic acid solution in 300 $\mathrm{mL}$ of this buffer solution is____ $\mathrm{mL}$.
→
$\Delta {G^o}(HI,\,g) \cong + 1.7\,kJ$. What is the equilibrium constant at ${25\,^o}C$ for $2HI_{(g)} \leftrightharpoons {H_2}_{(g)} + {I_2}_{(g)}$
→