_ Which of the following equations is obtained on combining 1st and 2n – 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 = CpdT + Vdp
D.	Tds = dE - PdV
Answer» B. DQ = CvdT + PdV

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