ThermodynamicsEasyBloom L2
Question
Which of the following processes must the first law of thermodynamics (Q = W + ᐃEint) ?
Options
A.W > 0, Q < 0 and ᐃEint > 0
B.W > 0, Q < 0 and < 0
C.W < 0, Q > 0 and ᐃEint < 0
D.W > 0, Q > 0 and <0
Solution
For (A) : W > 0, & ᐃEint > 0 ⇒ Q > 0
For (B) : W > 0, & ᐃEint < 0 ⇒ Q > 0 or Q < 0
For (C) : W < 0, & ᐃEint < 0 ⇒ Q < 0
For (D) : W > 0, & ᐃEint < 0 ⇒ Q > 0 or Q < 0
For (B) : W > 0, & ᐃEint < 0 ⇒ Q > 0 or Q < 0
For (C) : W < 0, & ᐃEint < 0 ⇒ Q < 0
For (D) : W > 0, & ᐃEint < 0 ⇒ Q > 0 or Q < 0
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