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 11 January 2016.
Statistics:
98 students sent a solution.  
3 points:  79 students. 
2 points:  14 students. 
1 point:  5 students. 
