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P. 4439. A sample of Oxygen gas of mass 32 g is compressed at a constant pressure from a volume of 8 litres to a volume of 7 litres. During the process the gas is cooled down such that the pressure of the gas remains constant. At the final state the temperature is 40 oC smaller than at the initial state.

a) What was the initial and final temperature of the gas?

b) What is the pressure of the gas?

c) How much work was done in joules?

d) What is the amount of heat released by the Oxygen?

(4 points)

Deadline expired on 10 May 2012.

Google Translation (Sorry, the solution is published in Hungarian only.)

Megoldásvázlat. a) A gáz hőmérséklete 320 K-ről 280 K-re csökkent.

b) A nyomás 3,32.105 Pa.

c) A végzett munka 332 J.

d) A leadott hő 1160 J.

Statistics on problem P. 4439.
 134 students sent a solution. 4 points: 62 students. 3 points: 51 students. 2 points: 15 students. 1 point: 6 students.

• Problems in Physics of KöMaL, April 2012

•  Támogatóink: Morgan Stanley