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T₂ = 327°C = 600 Kelvin
P = 0,2 atm = 2 10⁴ N/m²
V₂ / T₂ = V₁ / T₁
V₂ = V₁ T₂ / T₁
ΔU = Q - W
ΔU = C ΔT - P(V₂ - V₁)
ΔU = C (T₂ - T₁) - P(V₁ T₂/T₁ - V₁)
ΔU = C (T₂ - T₁) - P V₁ (T₂/T₁ - 1)
ΔU = 8 10³ (600 - 400) - 2 10⁴ 20 (600/400 - 1)
ΔU = 8 10³ 200 - 4 10⁵ (3/2 - 2/2)
ΔU = 1,6 10⁶ - 0,4 10⁶ (1/2)
ΔU = 1,6 10⁶ - 0,2 10⁶
ΔU = 1,4 10⁶
ΔU = 1.400.000 J
ΔU = 1400 kJ
Terimakasih, ini try out DKI ya? hahaha :p