743 J of heat energy is needed to raise the temperature of 5 moles of an ideal gas by 2 K at constant pressure. How much heat energy is needed to rais
743 J of heat energy is needed to raise the temperature of 5 moles of an ideal gas by 2 K at constant pressure. How much heat energy is needed to raise the temperature of the same mass of the gas by 2 K at constant volume? (R=8.3 J/mol K)
A. 826 J
B. 743 J
C. 660 J
D. 74.3 J
5 views
1 Answers
Correct Answer - C
`dQp=nC_(p)dt`
`C_(p)=(dQ_(p))/(nd_(T))`
`C_(p)-C_(V)=R`
`C_(V)=C_(p)-R`
`dQ_(V)=nC_(V)dT=(1)/(2)xx(7)/(2)Rxx40=70R`
5 views
Answered