ThermodynamicsMedium
Question
If ᐃQ and ᐃW represent the heat supplied to the system and the work done on the system respectively, then the first law of thermodynamics can be written as
Options
A.ᐃQ = ᐃU + ᐃW
B.ᐃQ = ᐃU - ᐃW
C.ᐃQ = ᐃW - ᐃU
D.ᐃQ = - ᐃW - ᐃU
Solution
From FLTO ᐃQ = ᐃU + ᐃW
∵ Heat suplied to the system so ᐃQ → and work is done on the system so ᐃW → Negative
Hence ++ᐃQ = ᐃU - ᐃW
∵ Heat suplied to the system so ᐃQ → and work is done on the system so ᐃW → Negative
Hence ++ᐃQ = ᐃU - ᐃW
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