Question

Смешали бензин массой 1.5 кг и спирт массой 0.5 кг .какое количество теплоты выделится при полном сгорании этого топлива.?ДОПОЛНИТЕЛЬНЫЕ ВЕЛИЧИНЫ:удельная теплота сгорания бензина 46 МДжУдельная теплота сгорания спирта 2.7*10^7

Answer 1

Удельная теплота сгорания бензина*m1+Удельная теплота сгорания спирта*m2=Q
Q=460000000*1.5+27000000*0.5=44166667Дж
Q=44МДж

Answer 2

The question is about the amount of heat released when a mixture of gasoline and alcohol is burned completely. The answer depends on the mass and the specific heat of combustion of each substance. The specific heat of combustion is the amount of heat released when one kilogram of a substance is burned completely. The formula for calculating the heat released by the mixture is:

Q = q1 * m1 + q2 * m2

where Q is the total heat, q1 and q2 are the specific heats of combustion of gasoline and alcohol, and m1 and m2 are their masses.

The question gives the following data:

m1 = 1.5 kg m2 = 0.5 kg q1 = 46 MJ/kg q2 = 2.7 * 10^7 J/kg

Plugging these values into the formula, we get:

Q = 46 * 10^6 * 1.5 + 2.7 * 10^7 * 0.5 Q = 82.5 * 10^6 J

Therefore, the amount of heat released by the mixture is 82.5 MJ.

This answer is similar to the one given by Anastasia in [this website](https://uchi.ru/otvety/questions/smeshali-benzin-massoy-1-5-kg-i-spirt-massoy-0-5-kg-kakoe-kolichestvo-teploti-videlitsya). You can also find other related problems and solutions on [this website](https://uchitel.pro/%d0%b7%d0%b0%d0%b4%d0%b0%d1%87%d0%b8-%d0%bd%d0%b0-%d1%81%d0%b3%d0%be%d1%80%d0%b0%d0%bd%d0%b8%d0%b5-%d1%82%d0%be%d0%bf%d0%bb%d0%b8%d0%b2%d0%b0/) and [this website](https://online-otvet.ru/fizika/5b7496f7f0470556cb755b81). I hope this helps you understand the concept of heat of combustion.