Respostas

2013-09-15T21:24:57-03:00
Q = m*c*/\T
Q = 50*1*(0-20)
Q = 1.000 calorias

Q = m*L
Q = 50*(-80)
Q = 4.000 calorias

Q = m*c*/\T
Q = 50*0,5*(-5 - 0)
Q = 25*(-5)
Q = -125cal
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Total = 1000 + 4000 + 125 = 5.125 calorias

Alternativa A
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