Which of the following equations is obtained on combining 1st and 2nd – McqOptions

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1.	Which of the following equations is obtained on combining 1st and 2nd law of thermodynamics, for a system of constant mass ?
A.	dE = Tds – PdV
B.	dQ = CvdT + PdV
C.	dQ = CvdT + PdV
D.	Tds = dE – PdV
Answer» B. dQ = CvdT + PdV

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