Please anyone tell me who knows clearly about carnot cycle. Read the following passage to understand the question clearly.
Reversible isothermal expansion of the gas at the "hot" temperature, TH (isothermal heat addition). During this step (A to B on diagram) the expanding gas causes the piston to do work on the surroundings. The gas expansion is propelled by absorption of heat from the high temperature reservoir.
2007-05-06 04:10:03 · 3 answers · asked by sivaprakash1984 1 in Science & Mathematics ➔ Engineering
The good old Joule Thomson effect is the reason gas cools as it expands. However, when Hydrogen expands it will heat up i am not kidding.
2007-05-06 10:58:55 · answer #1 · answered by Scott S 4 · 0⤊ 0⤋
The are several different cases related to gas expansion and temperature. To answer the question the way you stated it: as the gas expands, its temperature DECREASES. For its temperature to remain the same there must be an external source of heat.
2007-05-06 11:54:43 · answer #2 · answered by Kubrat V 1 · 0⤊ 0⤋
Get real familiar with the 'Ideal Gas Law'
PV = nRT
and you'll understand. As the gas expands, it's also absorbing heat so it's temperature remains constant (or nearly so)
HTH
Doug
2007-05-06 11:24:55 · answer #3 · answered by doug_donaghue 7 · 0⤊ 0⤋