Respostas

2014-05-25T21:53:31-03:00
Q = m * c * /\T (gelo)
Q = 20 * 0,5*(0-(-10))
Q = 10*10
Q = 100cal

Q = m * L
Q = 20 * 80
Q = 1600cal

Q = m * c * /\t (agua)
Q = 20*1*(0-(-20))
Q = 400 cal

Q_total = 1600 + 100 + 400
Q = 2100cal = 2,1kcal.
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