To Do Discussion tomorrow. LonCapa Exam Review (due Friday,
February 14 by 7 pm) Exam Tuesday, February 18 1
Slide 2
Exam 1 Tuesday, February 18; 7:00 pm 8:30 pm; 114 David Kinley
Hall (DKH) Conflict: 2/18; 5:00 pm 6:30 pm; 140 Burrill (sign up
outside of 101 CA) All free response. See me right away if you have
a conflict with the exam and conflict times. 2
Egg in a Bottle Using liquid nitrogen to cool the bottle. What
factors are changing? What factors are staying constant? Placing a
flame in the bottle. What factors are changing? What factors are
staying constant? 4
Slide 5
Clicker Question You are holding three balloons each containing
an equal mass of a different gas. The balloon containing which gas
is the largest balloon? a)H 2 b)He c)O 2 d) All have the same
volume. 5
Slide 6
Clicker Question You are holding three balloons each containing
an equal mass of a different gas. The balloon containing which gas
is the largest balloon? a)H 2 b)He c)O 2 d) All have the same
volume. 6
Slide 7
Clicker Question You are holding two 4.50-L balloons, one with
helium gas and one with SF 6 gas, both at 1.00 atm and 25C. In
which balloon is there a greater number of moles of gas? a)The
balloon filled with helium gas. b)The balloon filled with SF 6 gas.
c)The balloons contain an equal number of moles of gas. 7
Slide 8
Clicker Question You are holding two 4.50-L balloons, one with
helium gas and one with SF 6 gas, both at 1.00 atm and 25C. In
which balloon is there a greater number of moles of gas? a)The
balloon filled with helium gas. b)The balloon filled with SF 6 gas.
c)The balloons contain an equal number of moles of gas. 8
Slide 9
Clicker Question You are holding two 4.50-L balloons, one with
helium gas and one with SF 6 gas, both at 1.00 atm and 25C. In
which balloon is there a greater mass of gas? a)The balloon filled
with helium gas. b)The balloon filled with SF 6 gas. c)The balloons
contain an equal mass of gas. 9
Slide 10
Clicker Question You are holding two 4.50-L balloons, one with
helium gas and one with SF 6 gas, both at 1.00 atm and 25C. In
which balloon is there a greater mass of gas? a)The balloon filled
with helium gas. b)The balloon filled with SF 6 gas. c)The balloons
contain an equal mass of gas. 10
Slide 11
Gas Law Problems You are holding two 4.50-L balloons, one with
helium gas and one with SF 6 gas, both at 1.00 atm and 25C.
Determine the number of moles of each gas. (0.184 mol) Determine
the mass of each gas. (26.9 g SF 6, 0.736 g He) 11
Slide 12
Gas Law Problem What happens to a 4.50-L balloon at 25.0 C and
1.00 atm if you heat it to 95.5 C ? Solve for the new condition. (V
2 =5.56L) 12
Slide 13
Gas Law Problem What happens to a 4.50-L steel tank of gas at
25.0 C and 1.00 atm if you heat it to 95.5 C ? Solve for the new
condition. (P 2 =1.24 atm) 13
Slide 14
Clicker Question You have a certain mass of He gas in a rigid
steel container. You add the same mass of Ne gas to this container
at constant temperature. Which of the following best describes what
happens? a)The pressure in the container doubles. b)The pressure in
the container increases but the increase is less than double. c)The
pressure in the container more than doubles. 14
Slide 15
Clicker Question You have a certain mass of He gas in a rigid
steel container. You add the same mass of Ne gas to this container
at constant temperature. Which of the following best describes what
happens? a)The pressure in the container doubles. b)The pressure in
the container increases but the increase is less than double. c)The
pressure in the container more than doubles. 15
Slide 16
The Partial Pressure of each Gas in a Mixture of Gases in a
Container Depends on the Number of Moles of that Gas
Slide 17
Gas Law Problem Consider a sample of gas at 2.00 atm in a
35.0-L container at 25.0 C. You transfer all of the gas to a 70.0-L
container and you heat the gas to 50.0 C. Determine the new
pressure of the gas. (P 2 =1.08 atm) 17
Slide 18
Clicker Question As you increase the temperature of a sample of
gas at constant pressure and volume, what happens to the number of
moles of gas? a)The number of moles of gas increases. b)The number
of moles of gas decreases. c)The number of moles of gas does not
change. 18
Slide 19
Clicker Question As you increase the temperature of a sample of
gas at constant pressure and volume, what happens to the number of
moles of gas? a)The number of moles of gas increases. b)The number
of moles of gas decreases. c)The number of moles of gas does not
change. 19