>
Exams
>
Chemistry
>
Enthalpy change
>
from the given information calculate enthalpy of f
Question:
From the given information, calculate enthalpy of formation of 2 moles of $C_6H_6$(l) at 25°C. Given: $CH(C_6H_6$(l)) = –3264.6 kJ/mol $CH(C(s))$ = –393.5 kJ/mol $fH(H_2O(l))$ = –285.83 kJ/mol
JEE Main
Updated On:
Feb 25, 2026
–124.5 kJ/mol
–46.11 kJ/mol
46.11 kJ/mol
124.5 kJ/mol
Hide Solution
Verified By Collegedunia
The Correct Option is
C
Solution and Explanation
The Correct answer is option is (C) : 46.11 kJ/mol
Download Solution in PDF
Was this answer helpful?
0
0
Top Questions on Enthalpy change
The group 14 elements A and B have the first ionisation enthalpy values of 708 and 715 kJ mol$^{-1}$ respectively. The above values are lowest among their group members. The nature of their ions A$^{2+}$ and B$^{4+}$ respectively is:
JEE Main - 2025
Chemistry
Enthalpy change
View Solution
The incorrect relationship in the following pairs in relation to ionisation enthalpies is:
JEE Main - 2025
Chemistry
Enthalpy change
View Solution
Given below are two statements:
Statement (I): The radius of isoelectronic species increases in the order: \[ \text{Mg}^{2+} < \text{Na}^{+} < \text{F}^{-} < \text{O}^{2-} \] Statement (II): The magnitude of electron gain enthalpy of halogens decreases in the order: \[ \text{Cl} > \text{F} > \text{Br} > \text{I} \] In light of the above statements, choose the most appropriate answer from the options given below:
JEE Main - 2025
Chemistry
Enthalpy change
View Solution
Consider the following cases of standard enthalpy of reaction (\( \Delta H_f^\circ \) in kJ mol\(^{-1}\)):
\[ \text{C}_2\text{H}_6(g) + 7 \text{O}_2(g) \rightarrow 2 \text{CO}_2(g) + 3 \text{H}_2\text{O}(l) \quad \Delta H_1^\circ = -1550 \] \[ \text{C(graphite)} + \text{O}_2(g) \rightarrow \text{CO}_2(g) \quad \Delta H_2^\circ = -393.5 \] \[ \text{H}_2(g) + \frac{1}{2} \text{O}_2(g) \rightarrow \text{H}_2\text{O}(g) \quad \Delta H_3^\circ = -286 \]
The magnitude of \( \Delta H_f^\circ \) of \( \text{C}_2\text{H}_6(g) \) is
\(\_\_\_\_\_\)
kJ mol\(^{-1}\) (Nearest integer).
JEE Main - 2025
Chemistry
Enthalpy change
View Solution
The bond dissociation energies of gaseous H
2
, Cl
2
, and HCl are 104, 58, and 103 kcal, respectively. The enthalpy of formation of HCl gas would be:
BCECE - 2025
Chemistry
Enthalpy change
View Solution
View More Questions
Questions Asked in JEE Main exam
An infinitely long straight wire carrying current $I$ is bent in a planar shape as shown in the diagram. The radius of the circular part is $r$. The magnetic field at the centre $O$ of the circular loop is :
JEE Main - 2026
Current electricity
View Solution
As shown in the diagram, when the incident ray is parallel to base of the prism, the emergent ray grazes along the second surface. If refractive index of the material of prism is $\sqrt{2}$, the angle $\theta$ of prism is :
JEE Main - 2026
Atomic Physics
View Solution
The unsaturated ether on acidic hydrolysis produces carbonyl compounds as shown below. Based on this, predict the solution/reagent that will help to distinguish "P" and "Q" obtained in the reaction.
JEE Main - 2026
Aldehydes And Ketones
View Solution
The value of
\[ \left(\frac{1}{3}+\frac{4}{7}\right) +\left(\frac{1}{3^2}+\frac{1}{3}\times\frac{4}{7}+\frac{4}{7^2}\right) +\left(\frac{1}{3^3}+\frac{1}{3^2}\times\frac{4}{7}+\frac{1}{3}\times\frac{4}{7^2}+\frac{4}{7^3}\right) +\cdots \text{ up to infinite terms is} \]
JEE Main - 2026
Integration
View Solution
From the following, how many compounds contain at least one secondary alcohol?
JEE Main - 2026
Alcohols, Phenols and Ethers
View Solution
View More Questions