One mole of a non-ideal gas undergoes a change of state (.2.0 atm,3.0 L,95 K.) arrow (.4 atm, 5 L, 245 K.) with a change in internal energy, Δ E=30.0 L atm. The change in enthalpy, Δ H , of the process in L atm is

Question

One mole of a non-ideal gas undergoes a change of state (.2.0 atm,3.0 L,95 K.) arrow (.4 atm, 5 L, 245 K.) with a change in internal energy, Δ E=30.0 L atm. The change in enthalpy, Δ H , of the process in L atm is (A) 40.0 (B) 42.3 (C) 44.0 (D) not defined, because pressure is not constant

Tardigrade Admin · Accepted Answer

Δ H=Δ E+Δ (.PV.) Δ H=30+(4 × 5 - 2 × 3)=44Latm

Q. One mole of a non-ideal gas undergoes a change of state $(2.0 a t m, 3.0 L, 95 K)$ $\to (4 a t m, 5 L, 245 K)$ with a change in internal energy, $Δ E = 30.0 L a t m .$ The change in enthalpy, $Δ H$ , of the process in L atm is

$40.0$

$42.3$

$44.0$

not defined, because pressure is not constant

$Δ H = Δ E + Δ (P V)$
$Δ H = 30 + (4 \times 5 - 2 \times 3) = 44 L a t m$

Q. One mole of a non-ideal gas undergoes a change of state (2.0atm,3.0L,95K) →(4atm,5L,245K) with a change in internal energy, ΔE=30.0Latm. The change in enthalpy, ΔH , of the process in L atm is

40.0

42.3

44.0