400 J kg-1K-1
500 J kg-1K-1
390 J kg-1K-1
130 J kg-1K-1
Correct answer is B
Heat supplied by the heater in 10 mins
= power x time
= 50 x (10 x 60)
= 30000 J
This heat is equal = MCΔt
= 5 x c x 12
= 60cJ
= 60C = 30,000
C = 30,000/60
C = 500 J kg-1K-1
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