Quiz 1
Version B
Chapter 9
1/15/16
On the ParScore form you need to fill in your perm number, test version, and name.
Failure to do any of these things will result in the loss of 1 point. Your perm
number is placed and bubbled in under the “ID number.” Do not skip boxes or put
in a hyphen unused boxes should be left blank. Bubble in your test version (B)
under the “test form.” Note: your ParScore form will not be returned to you,
therefore, for your records, you may want to mark your answers on this sheet. Each
question is worth 2 points.
1. For a particular process q = –10 kJ and w = 25 kJ. Which of the following statements is true?
A) The system does work on the surroundings.
B) E = –35 kJ
C) Heat flows from the surroundings to the system.
D) All of these are true.
E) None of these is true.
2. A 140.0-g sample of water at 25.0°C is mixed with 100.0 g of a certain metal at 100.0°C. After
thermal equilibrium is established, the (final) temperature of the mixture is 29.6°C. What is the
heat capacity of the metal, assuming it is constant over the temperature range concerned?
A) 0.38 J/g°C
B) 0.031 J/g°C
C) 0.76 J/g°C
D) 0.96 J/g°C
E) None of the above
Consider a process carried out on 1.00 mol of a monatomic ideal gas by the following two
different pathways. The first pathway is A (3.00 atm, 20.0 L) to C (1.00 atm, 20.0 L) to D (1.00
atm, 50.0 L); and the second pathway is A (3.00 atm, 20.0 L) to B (3.00 atm, 50.0 L) to D (1.00
atm, 50.0 L). In each case, the gas is taken from state A to state D.
3. Calculate HABD.
A) –25 L•atm
B) –475 L•atm
C) 475 L•atm
D) 25 L•atm
E) None of the above
4. What mass of propane, C3H8(g), must be burned at constant pressure to supply 2580 kJ of heat?
Substance
C3H8(g)
CO2(g)
H2O(l)
A)
B)
C)
D)
E)
-104
-393.5
-286
75.9 g
25.6 g
51.2 g
102 g
None of the above
5. A 1.00-g sample of the rocket fuel hydrazine, N2H4, is burned in a bomb calorimeter containing
1200. g of water. The temperature of the water and the bomb calorimeter rises from 24.62°C to
28.16°C. Assuming the heat capacity of the empty bomb calorimeter is 837 J/°C, calculate the
heat of combustion of 1 mol of hydrazine in the bomb calorimeter. (The specific heat capacity of
water is 4.184 J/g•°C.)
A) –152 kJ
B) +20.7 kJ
C) +47.4 kJ
D) –569 kJ
E) None of the above
6. Helium gas, at a pressure of 2 Pa is placed in a container with a moveable piston. On the other
side of the piston is a vacuum. The He gas is allowed to expand such that the volume of the
helium goes from 2 m3 to 4 m3 . How much work does the He gas do?
A) 0 J
B) -4 J
C) 4 J
D) 8 J
E) None of the above