PN03 · Quiz — Heat & Thermodynamics

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Question 1

The van der Waals equation of state for a real gas is (P + a/V²)(V - b) = RT per mole. The term a/V² corrects for:

AFinite volume of molecules

BIntermolecular attractive forces reducing the

CGravitational effects at high pressure

DKinetic energy of the molecules

Question 2

The work done by an ideal gas in an isothermal expansion from volume V₁ to V₂ at temperature T is:

AnRT(V₂-V₁)

BnRT ln(V₂/V₁)

CP(V₂-V₁)

DZero (isothermal means no work)

Question 3

For an adiabatic process of an ideal gas, PVγ = constant. The work done in adiabatic expansion from (P₁,V₁) to (P₂,V₂) is:

AnCvΔT (= -ΔU since Q=0)

BP₁V₁ - P₂V₂

C(P₁V₁ - P₂V₂)/(γ-1)

DnCpΔT

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PN03 — Heat & Thermodynamics — Quiz