Mathematical and Physical Journal
for High Schools
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# Problem P. 4781. (December 2015)

P. 4781. 200 g water is heated on a camping stove from a temperature of $\displaystyle 15~{}^\circ$C to a temperature of $\displaystyle 75~{}^\circ$C. (The cartridge of the stove contains 80% butene and 20% propane.)

By what amount does the total mass of the stove change during the heating process, if the efficiency of heating is 60%?

(3 pont)

Deadline expired on January 11, 2016.

### Statistics:

 98 students sent a solution. 3 points: 79 students. 2 points: 14 students. 1 point: 5 students.

Problems in Physics of KöMaL, December 2015