a gas is contained in a metallic container fited with a piston. the piston is suddenly moved in to compress the gas and is maintained at this positon. as time passes the pressure of the gas in the cylinder :
1) increases
2) decreases
3) remains constant
4) increases or decreases depending on the nature of the gas
the answer is given as 2) decreases.
please explain it to me...
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2 Answers
262when the piston is compressed suddenly , it is done adiabatically (dQ=0).
thus when the volume suddenly decreases, the temp and pressure rise considerably.
thus heat is developed in the system.
after some time , the gas loses the heat to the surroundings and thus the temp. and press. of the gas decreases.
