One mole of an ideal gas undergoes a change in state from 2 atm - 3 L - 95 K to 4 atm - 5 L - 245 K - Calculate the change in enthalpy if - U -30 L -atm-A- Cannot be predicted as pressure is not constantB- 40 L - atmC- 42-3 L - atmD- 44 L - atm

The correct option is C 42.3L atmΔH=ΔU+Δ(PV) =30+[(5 × 4) (2 × 3)] ΔH=44L atm ...

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Standard XII

Chemistry

Enthalpy

One mole of a...

Question

One mole of an ideal gas undergoes a change in state from (2 atm, 3L, 95K) to (4 atm, 5L, 245K). Calculate the change in enthalpy if $Δ U = 30 L - a t m$ :

40L - atm

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42.3L - atm

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44L - atm

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Cannot be predicted as pressure is not constant

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Solution

The correct option is B 42.3L - atm
$Δ H = Δ U + Δ (P V)$
$= 30 + [(5 \times 4) - (2 \times 3)]$
$Δ H = 44 L - a t m$

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One mole of an ideal gas undergoes a change in state from (2 atm, 3L, 95K) to (4 atm, 5L, 245K). Calculate the change in enthalpy if ΔU=30L−atm:

The correct option is B 42.3L - atmΔH=ΔU+Δ(PV) =30+[(5×4)−(2×3)] ΔH=44L−atm

One mole of an ideal gas undergoes a change in state from (2 atm, 3L, 95K) to (4 atm, 5L, 245K). Calculate the change in enthalpy if $Δ U = 30 L - a t m$ :

The correct option is B 42.3L - atm
$Δ H = Δ U + Δ (P V)$
$= 30 + [(5 \times 4) - (2 \times 3)]$
$Δ H = 44 L - a t m$