Last Updated
：2025/12/07
Clausius theorem
Proper noun
A
theorem
stating
that,
for
a
thermodynamic
system
exchanging
heat
with
external
reservoirs
and
undergoing
a
thermodynamic
cycle,
∮(𝛿Q)/(T_surr)≤0,,
where
𝛿Q
is
the
infinitesimal
amount
of
heat
absorbed
by
the
system
from
the
reservoir,
and
T_surr
is
the
temperature
of
the
external
reservoir
(surroundings)
at
a
particular
instant
in
time.
Japanese Meaning
カルーシウスの定理：熱力学的系が外部の熱貯蔵庫（周囲）と熱のやり取りを行い、サイクルを経る場合に、系が受け取る微小な熱量（δQ）とその時の外部温度（T_surr）との比の閉積分が0以下になることを示す定理。
Sense（1）
A
theorem
stating
that,
for
a
thermodynamic
system
exchanging
heat
with
external
reservoirs
and
undergoing
a
thermodynamic
cycle,
∮(𝛿Q)/(T_surr)≤0,,
where
𝛿Q
is
the
infinitesimal
amount
of
heat
absorbed
by
the
system
from
the
reservoir,
and
T_surr
is
the
temperature
of
the
external
reservoir
(surroundings)
at
a
particular
instant
in
time.
（ canonical ）
Quizzes for review
A theorem stating that, for a thermodynamic system exchanging heat with external reservoirs and undergoing a thermodynamic cycle, ∮(𝛿Q)/(T_surr)≤0,, where 𝛿Q is the infinitesimal amount of heat absorbed by the system from the reservoir, and T_surr is the temperature of the external reservoir (surroundings) at a particular instant in time.
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See correct answer
Clausius theorem
Clausius theorem is an important principle in thermodynamics.
See correct answer
Clausius theorem is an important principle in thermodynamics.
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