Download App

Thermodynamics — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryThermodynamics1 Mark
MCQ
A thermochemical equation :
  • A
    Includes only the balanced chemical reaction
  • ✓
    Includes the balanced chemical reaction and change in enthalpy value
  • C
    Includes only the change in enthalpy value
  • D
    Includes the unbalanced chemical reaction and change in enthalpy value
✓

Answer

Correct option: B.
Includes the balanced chemical reaction and change in enthalpy value
A thermochemical equation includes the balanced chemical reaction and change in enthalpy value.
A thermochemical equation is a balanced chemical equation in which the exact value of enthalpy change, physical states and number of moles of reactants and products are specified. Following is the example of thermochemical equation between methane and oxygen.
$\mathrm{CH}_4(\mathrm{~g})+2 \mathrm{O}_2(\mathrm{~g}) \rightarrow \mathrm{CO}_2(\mathrm{~g})+2 \mathrm{H}_2 \mathrm{O}(\mathrm{I}) \Delta \mathrm{Ho}=-890 \mathrm{~kJ}$

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 Thermodynamics→Thermodynamics — all question types→Chemistry STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

Which of the following halogen can be purified by sublimation
→
Chlorine exists in two isotopic forms, $\text{Cl}-37$ and $\ce{Cl}-35$ but its atomic mass is $35.5$. This indicates the ratio of $\ce{Cl}-37$ and $\ce{Cl}-35$ is approximately :
→
Which of the following species would be expected paramagnetic
→
The reaction $2A(g)+ B(g)  \rightleftharpoons  3C(g) + D(g)$ is began with the concentrations of $A$ and $B$ both at an initial value of $1.00\, M$. When equilibrium is reached, the concentration of $D$ is measured and found to be $0.25\, M$. The value for the equilibrium constant for this reaction is given by the expression
→
What will be the maximum number of electrons in any atom having quantum numbers $n = 4, l = 2, m = -2$
→
Two radiations having energies $E_1$ and $E_2$ as $15\,eV$ and $45\, eV$ respectively  then the relationship in between $\lambda_1$ and $\lambda_2$ will be
→
The product formed in the following multistep reaction is:
→
Which of the following shape of molecule is not obtained from the trigonal bipyramidal electronic geometry of the central atom ?
→
Which of the following compound is optically active?
→
Which element has the highest valency with respect to oxygen?
→