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Standard XII

Chemistry

Enthalpy

One mole of a...

Question

One mole of a non - ideal gas undergoes a change of state (2.0 atm, 3.0 L, 95K) $\to$ (4.0 atm, 5.0L, 245 K) with a change in internal energy $Δ U = 30.0 L$ atm. The change in enthalpy of the process in L atm is ?

40.0

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42.3

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44.0

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Not defined, because it is not constant,

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Solution

The correct option is C
44.0

$Δ H = Δ U + (P_{2} V_{2} - P_{1} V_{1}) = 30 + (4 \times 5 - 2 \times 3) = - 44 L a t m$

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One mole of a non - ideal gas undergoes a change of state (2.0 atm, 3.0 L, 95K) → (4.0 atm, 5.0L, 245 K) with a change in internal energy ΔU=30.0L atm. The change in enthalpy of the process in L atm is ?

The correct option is C 44.0 ΔH=ΔU+(P2V2−P1V1)=30+(4×5−2×3)=−44L atm

One mole of a non - ideal gas undergoes a change of state (2.0 atm, 3.0 L, 95K) $\to$ (4.0 atm, 5.0L, 245 K) with a change in internal energy $Δ U = 30.0 L$ atm. The change in enthalpy of the process in L atm is ?

The correct option is C
44.0

$Δ H = Δ U + (P_{2} V_{2} - P_{1} V_{1}) = 30 + (4 \times 5 - 2 \times 3) = - 44 L a t m$