Question

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Answer 1

Φ = Q/Δt
Φ = m.c.Δθ/Δt
400 = (800) . c . (120 - 40) / (80-0)
400 = (800) . c . (80) / 80
800 . 80 . c = 80 . 400
8.8 c = 8.4
c = 8.4 / 8.8
c = 4/8
c = 1/2 = 0,5 cal/g°C

B