A solid metallic block weighing 5 kg has an initial temperature of 500 – McqOptions

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1.	A solid metallic block weighing 5 kg has an initial temperature of 500°C. 40 kg of water initially at 25°C is contained in a perfectly insulated tank. The metallic block is brought into contact with water. Both of them come to equilibrium. Specific heat of block material is 0.4 kJ.kg. K. Ignoring the effect of expansion and contraction and also the heat capacity to tank, the total entropy change in kJ.kg , K is
A.	-1.87
B.	0
C.	1.26
D.	3.91
Answer» C. 1.26

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