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尋
焓
語
哨
纂
焓者,熱理能量也。
H
=
U
+
p
V
{\displaystyle H=U+pV}
闔子系統焓之和曰:
H
=
∑
k
H
k
,
{\displaystyle H=\sum _{k}H_{k},}
H
者,子系統總焓也;
k
者,各子系統也;
H
k
者,各子系統之焓也。
微分形式曰:
d
H
=
d
U
+
d
(
p
⋅
V
)
=
T
⋅
d
S
−
p
⋅
d
V
+
p
⋅
d
V
+
V
⋅
d
p
=
T
⋅
d
S
+
V
⋅
d
p
{\displaystyle \mathrm {d} H=\mathrm {d} U+{d}(p\cdot V)=T\cdot {d}S-p\cdot {d}V+p\cdot {d}V+V\cdot {d}p=T\cdot {d}S+V\cdot {d}p}