Кто сможет с физикой ну хотя бы узнать основу?

Все количество теплоты, полученное от сгорания спирта, пойдет на нагрев воды от температуры до температуры .

Удельная теплоемкость воды 
Удельная теплота сгорания спирта 

Получившаяся температура больше температуры кипения воды, поэтому вода (или ее часть) превратится в пар.
Оценим, хватит ли выделившегося количество теплоты для того, чтобы превратить в пар всю воду. К затратам на нагревание воды добавим затраты на парообразование:

- температура кипения воды
- масса воды, которую удастся превратить в пар
- удельная теплота парообразования воды

Таким образом, вода нагреется до 100 градусов Цельсия (то есть на 80 градусов Цельсия) и, кроме этого, 2.06 кг превратятся в пар.
ответ: на 80 градусов Цельсия

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