Q5.At constant pressure, which of these systems do work on the surroundings? Check all that apply.
A) 2A(g) + 3B(g) ?4C(g).
B) 2A(g) + 2B(g) ?5C(g).
C) A(s) + B(s) ?2C(g).
D) 2A(g) + B(g) ?C(g).
E) None of the above.
Looking at the molar coefficients of products and reactants. Work on the surroundings will be done when the number of moles of gases in the products is greater than the number of moles of gas reactants.
Q6.Mercury (Hg) is the liquid of choice in a barometer. At sea level, 1 atm = 76 cmHg; the density of Hg is 13.5 g/mL. How would the height of a water column at sea level compare with the height of a Hg column?
A) Both columns would have the same height.
B) The water column would be higher.
C) The water column would be shorter.
Refer to Equation 10.1 of textbook.
? = ??????
2 | P a g e Height and density are inversely proportional. Water with a lower density than mercury will be expected to have a higher height.
Q7.Observe the readings on the pressure gauge as the air in the syringe is compressed and then allowed to expand. What is the relationship between the volume (V) and pressure (P) of a gas?
A) V is directly proportional to P.
B) V is inversely proportional to P.
C) There is no relationship between V and P.
Refer to page 421 of textbook explaining Boyle’s law.
Q8. Imagine you are blowing up balloons in a room at some ambient temperature (and constant pressure). What do you think is the relationship between the volume of the balloon and the amount of gas (n = number of moles) in it?
A) V is directly proportional to n.
B) V is inversely proportional to n.
C) There is no relationship between V and n.
Refer to Equation 10.9, the ideal gas law.
Q9.Consider the figure below: The molecular description of ideal gas behavior depicted in this figure shows that
