Page 17 - Surviving Chemistry BFF Homework Helper and Test Prep Preview
P. 17
The heavier the gas, the more it deviates from
(behaves least like) an ideal gas.
H2 (2 g) He (4 g ) N2 (28 g) O2 (32 g)
Lightest Heaviest
Effect of Molecular Mass
deviates least deviates most
A gas deviates least from an ideal gas under
High Temperature & Low Pressure.
A gas deviates most from an ideal gas under
Effect of Temperature Low Temperature & High Pressure.
and Pressure
Gases with the same volume
under the same temperature
and the same pressure
have equal # of molecules
Gas A and Gas B
contain equal
number of molecules
Volume of a gas is inversely
at proportional to the pressure
• As pressure increases,
volume decreases
(Boyle’s Law) P (atm)
Volume of a gas is directly
proportional to the Kelvin
at
temperature of the gas
• As temperature increases,
(Charles’ Law) volume increases
T (K)
Pressure of a gas is directly
temperature of the gas
at proportional to the Kelvin
(Gay-Lussac’s Law) • As temperature increases,
pressure increases
T (K)
No constant (all three factors,
P, V, and T, are changing).
• Mass of the gas is the only
constant
Copyright © 2014. E3 Scholastic Publishing. SurvivingChem.com 15
