Mathematical and Physical Journal
for High Schools
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Problem P. 4269. (September 2010)

P. 4269. 4 kJ heat is added to a sample of gas whose original temperature is 300 K. Both the volume and the pressure of the gas is doubled, and the gas does 1 kJ work on its environment during the process. The graph of the process on the p-V diagram is a straight line.

a) How many moles of gas are there in the sample?

b) How many atoms constitute one molecule of the gas?

(4 pont)

Deadline expired on October 11, 2010.

Sorry, the solution is available only in Hungarian. Google translation

Megoldás. A folyamatban 0,67 mol egyatomos gáz vesz részt.


108 students sent a solution.
4 points:90 students.
3 points:1 student.
2 points:7 students.
0 point:7 students.
Unfair, not evaluated:3 solutionss.

Problems in Physics of KöMaL, September 2010