Дано :m-2кг,t1-0*c,t2-50*c,l-3,4×10сверху 5,c-4200.Q-?

Дано: [latex]m=2kg[/latex] [latex]t_1=0^oC[/latex] [latex]t_2=50^oC[/latex] [latex]C=4200 \frac{Dg}{kg*C} [/latex] λ [latex]=3,4*10^5 \frac{Dg}{kg} [/latex] [latex]-----[/latex] [latex]Q-?[/latex] Решение: [latex]Q=Q_1+Q_2[/latex] [latex]Q_1=[/latex] λ [latex]m[/latex] [latex]Q_2=Cm(t_2-t_1)[/latex] [latex]Q_1=340000 \frac{Dg}{kg} *2kg=680000Dg [/latex] [latex]Q_2=4200 \frac{Dg}{kg*^oC}*2kg*(50^oC-0^oC)= 420000Dg[/latex] [latex]Q=680000Dg+420000Dg=1100000Dg=1.1MDg[/latex] Ответ: [latex]Q=1,1MDg[/latex]