...为理想气体)从1000kpa经绝热可逆膨胀到100kpa.求Q,W,U,H_百度...
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发布时间：2023-12-30 03:45
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热心网友
时间：2024-08-01 09:27
绝热，Q=0
r = Cp,m / Cv,m = (Cv,m+R)/Cv,m = (3/2 R +R)/ (3/2 R) = 5/3
T₁^r p₁^(1-r) = T₂^r p₂^(1-r)
解得 T₂ = 228 K
ΔU=W = n Cv,m (T₂ - T₁) = - 4302 J
ΔH = n Cp,m (T₂ - T₁) = (3/2R +R)(T₂-T₁) = - 7171 J
