Gas Problems #4
760 torr = 760 mm Hg = 1 atm
R = 0.0821 L atm/mol K
1
. If 333 mL of an ideal gas at a temperature of 25˚ C and a pressure of 750. torr has its
temperature lowered to 11˚ C and its pressure lowered to 730. mm Hg, what will its new
volume be in milliliters?
2
. What will the temperature be in ˚C if 2.0 liters of an ideal gas at 0˚ C is expanded to 2.5
liters? Its initial pressure was 750 mm Hg and its final pressure is 740 mm Hg.
3
. A sample of an ideal gas occupying 0.50 liters at 0.99 atm pressure and a temperature of
273 K is expanded until its volume is 755 mL and the temperature is 0˚ C. What will be its
pressure in torrs?
4
. What will be the volume at STP for an ideal gas which occupies 333 mL at 298 K and
755 mm Hg pressure?
5
. What pressure in atmospheres will be exerted by 0.312 moles of an ideal gas at 42˚ C in
a volume of 58.4 mL?
6
. How many moles of gas will occupy 5.0 liters at STP?
7
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 Spring '11
 harrison
 Torr, mm Hg

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