1/ A vessel including 10L of gas is collected at 120oK and then allowed to expand to 15L. What would be the new temperat

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1/ A vessel including 10L of gas is collected at 120oK and then
allowed to expand to 15L. What would be the new temperature be in
order to maintain the same pressure?
2/ A gas heated from 275 oK to 310 oK and the volume is increased
from 28 liters to 40 liters by moving a large piston within a
cylinder. If the original pressure is 1.3 atm. What would the final
pressure be?
3/ The pressure of gas is reduced from 125.0 mm Hg to 900 mm Hg as
the volume of its container is increased by moving a piston from 80
mL to 340 mL. What would be the final temperature be if the
original temperature was 95℃?