Thermodynamics and Thermochemistry - Result Question 34
34. One mole of a non-ideal gas undergoes a change of state $(2.0 $ $atm, 3.0$ $ L, 95 K) \longrightarrow(4.0$ $ atm, 5.0 L, 245 $ $K)$ with a change in internal energy, $\Delta E=30.0 L$-atm. The change in enthalpy $(\Delta H)$ of the process in L-atm is
(2002, 3M)
(a) $40.0$
(b) $ 42.0$
(c) $44.0$
(d) not defined, because pressure is not constant
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Answer:
Correct Answer: 34. (c)
Solution:
$\Delta H=\Delta U+\Delta(p V)=30+2(5-3)+5(4-2)=44 {~L} {~atm}$.
BETA
