Question

calcule o equilíbrio  térmico na mistura da 1000 g h2o a 100°c com 2000g de alcool a 10°c.sendo o calor especifico da agua ch2=1 cal/g°c calor especifico do alcool=0,6cal/g°c

Answer 1

Q1 + Q2 = 0

Q=m*c*/\t

1000 * 1 * (tf - 100) + 2000 * 0,6 * (tf - 10) = 0

1000tf - 100.000 + 1200*(tf - 10) = 0

1000tf - 100.000 + 1200tf - 12.000 = 0

2.200tf - 112.000 = 0

tf = 112.000/2200

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tf = 50,96 ~= 51°C
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