Предмет: Физика, автор: умница1109

Сухое горючее ( гексаметилентетрамин ) обладает теплотой сгорания q = 30 кДж/г. Сколько грамм ов сухого горючего потребуется для того, чтобы вскипятить M = 200 г воды. Эффективность подогревателя η = 4 0 %, удельная теплоемкость воды c B = 4,2 Дж/г, температура в комнате t 0 = 20 0 С.

Ответы

Автор ответа: helpme58
0
Q1= c *M * ( t2-t1)
Q2= q m
n q m = cM(t2-t1)
m= cM(t2-t1) / qn
m= 4,2*200*80 / 0,4* 30000 = .....г
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