Admita que: 1) calor latente de fusão do gelo = 80 cal/g;
2) calor específico do gelo = 0,50 cal/ g°C e
3) calor específico da água = 1,0 cal/g°C
20 g de gelo a -4,0°C e 100 g de água a 20°C trocam calor exclusivamente entre si. a temperatura de equilíbrio desse sistema, em °C, é:
a) 1,0
b) 2,0
c) 3,0
d) 4,0
e) 5,0
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