(A) For an isothermal process,the change in internal energy $\Delta U = 0$. According to the first law of thermodynamics,$\Delta U = q + w$. Since $\D

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

$q = 2.303 \ nRT \ \log \ \frac{V_2}{V_1}$

(A) For an isothermal process,the change in internal energy $\Delta U = 0$. According to the first law of thermodynamics,$\Delta U = q + w$. Since $\Delta U = 0$,we have $q = -w$. For a reversible expansion process,the work done is $w = -2.303 \ nRT \ \log \ \frac{V_2}{V_1}$. Therefore,$q = -(-2.303 \ nRT \ \log \ \frac{V_2}{V_1}) = 2.303 \ nRT \ \log \ \frac{V_2}{V_1}$.

Class 11 Chemistry Thermodynamics First law of thermodynamics

Medium

For an isothermal reversible expansion process,the value of $q$ can be calculated by the expression

A
$q = 2.303 \ nRT \ \log \ \frac{V_2}{V_1}$
B
$q = -2.303 \ nRT \ \log \ \frac{V_2}{V_1}$
C
$q = - 2.303 \ nR \ \log \ \frac{V_1}{V_2}$
D
$q = - P_{\text{exp}} \ nRT \ \log \ \frac{V_1}{V_2}$

Explore More

Browse All

Question Bank

All Subjects

Class 11 Questions

Class 11

Chemistry Questions

Chapter

Thermodynamics

Subtopic

First law of thermodynamics

Three moles of an ideal gas expand reversibly under isothermal conditions from $2 \, L$ to $20 \, L$ at $300 \, K$. The amount of heat change (in $kJ / mol$) in the process is:

DifficultKVPY 2012

View Solution

$A$ gas expands isothermally from $10 \, dm^3$ to $20 \, dm^3$ at a constant external pressure of $1 \, atm$. If it absorbs $800 \, J$ of heat from the surroundings,what is the value of $\Delta U$ in $J$ for this process?

Difficult

View Solution

For the reaction $CO_{(g)} + \frac{1}{2} O_{2(g)} \to CO_{2(g)}$,which of the following is true?

Easy

View Solution

For the reaction $Ag_2O_{(s)} \rightarrow 2Ag_{(s)} + \frac{1}{2}O_{2(g)}$,which of the following is true?

Easy

View Solution

For the reaction $CO_{(g)} + \frac{1}{2} O_{2(g)} \rightarrow CO_{2(g)}$ at constant temperature and pressure,which of the following statements is correct?

Easy

View Solution

Vedclass Products

For Students

Vedclass Test Series

Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.

Start Free Trial

For Teachers

Exam Paper Generator

Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.

Try Free

For Institutes

Online Exam Module

Live online exams with unlimited students, 360° analytics & white-label branding.

See Demo

For an isothermal reversible expansion process,the value of $q$ can be calculated by the expression

Similar Questions

Three moles of an ideal gas expand reversibly under isothermal conditions from $2 \, L$ to $20 \, L$ at $300 \, K$. The amount of heat change (in $kJ / mol$) in the process is:

$A$ gas expands isothermally from $10 \, dm^3$ to $20 \, dm^3$ at a constant external pressure of $1 \, atm$. If it absorbs $800 \, J$ of heat from the surroundings,what is the value of $\Delta U$ in $J$ for this process?

For the reaction $CO_{(g)} + \frac{1}{2} O_{2(g)} \to CO_{2(g)}$,which of the following is true?

For the reaction $Ag_2O_{(s)} \rightarrow 2Ag_{(s)} + \frac{1}{2}O_{2(g)}$,which of the following is true?

For the reaction $CO_{(g)} + \frac{1}{2} O_{2(g)} \rightarrow CO_{2(g)}$ at constant temperature and pressure,which of the following statements is correct?

Vedclass Test Series

Exam Paper Generator

Online Exam Module