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43. Which temperature change would cause a sample of an ideal gas to double in volume while the pressure is held constant?(1) from 400.K to 200.K
(2) from 200.K to 400.K
(3) from 400.oC to 200.oC
(4) from 200.oC to 400.oC
This question may be answered by looking at the equation for ideal gases. The ideal gas equation is pV = nRT. Which implies that If pressure is constant (n is constant if the amount of gas is not changed and R is the Universal Constant of Gases), then V / T is constant. Then if V is doubled T is also doubled. Then the answer is the option (2) from 200K to 400K..
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