Question :
11) The atmospheric pressure in Denver, CO 633 mmHg. What : 1362934
11) The atmospheric pressure in Denver, CO is 633 mmHg. What is this pressure in atm?
A) 1.20 atm
B) 633 atm
C) 0.833 atm
D) 1.00 atm
E) 127 atm
12) The boiling point of water at sea level is 100 °C. At higher altitudes, the boiling point of water will be
A) lower, because temperatures are lower.
B) lower, because the atmospheric pressure is lower.
C) higher, because the altitude is greater.
D) higher, because there are fewer water molecules in the air.
E) the same, because water always boils at 100 °C.
13) Vapor pressure can be described as
A) the temperature at which bubbles of vapor appear in a liquid.
B) the pressure exerted on the earth by the particles in the air.
C) the temperature at which the vapor pressure of a liquid equals atmospheric pressure.
D) the pressure exerted by a gas above the surface of its liquid.
E) the pressure within the lungs during inhalation.
14) An autoclave is used to sterilize surgical equipment because
A) it allows water to boil at temperatures less than 100 °C.
B) it allows water to boil at 100 °C at pressures less than 1 atm.
C) it allows water to boil at 100 °C at pressures greater than 1 atm.
D) it allows water to boil at temperatures above 100 °C.
E) it provides very high temperatures and very low pressures.
15) According to Boyle’s Law, the pressure of a gas increases as the volume decreases because
A) the gas particles get bigger.
B) the kinetic energy of the gas particles increases.
C) the temperature of the gas increases.
D) the gas particles strike the walls of the container with more force.
E) the gas particles strike the walls of the container more often.
16) Which of the following correctly describes the process of inspiration (air entering the lungs)?
A) The lungs expand, causing their internal pressure to decrease.
B) The lungs expand, causing their internal pressure to increase.
C) The lungs contract, causing their internal pressure to decrease.
D) The lungs contract, causing their internal pressure to increase.
E) There is no change in the internal pressure in the lungs.
17) The volume of a gas with a pressure of 1.2 atm increases from 1.0 L to 4.0 L. What is the final pressure of the gas, assuming constant temperature?
A) 1.2 atm
B) 0.30 atm
C) 3.3 atm
D) 4.8 atm
E) 1.0 atm
18) The pressure of 5.0 L of gas increases from 1.50 atm to 1240 mm Hg. What is the final volume of the gas, assuming constant temperature?
A) 4100 L
B) 5.0 L
C) 0.0060 L
D) 5.4 L
E) 4.6 L
A balloon is filled with helium gas. For the question(s) that follow, select the letter of the balloon diagram that corresponds to the given change in conditions.
19) The balloon is put into a chamber whose pressure is less than the atmospheric pressure and at atmospheric temperature.
A) A
B) B
C) C
D) A and B
E) B and C
20) The temperature is changed from 50 °C to -150 °C at constant pressure.
A) A
B) B
C) C
D) A and B
E) B and C
