Unit 1: gases and kinetics
2. the following chemical reaction was performed in lab:
c(s) +2h2(g) - ch (g)
the reaction was performed where methane produced was bubbled through water and
into a eudiometer . as the reaction proceeds, the methane displaces the water inside the
eudiometer and the water escapes into a water bath below the eudiometer. below is the
data table recorded from the experiment.
mass of carbon
0.0114g
height above water level 10.2cm
of water bath
volume inside the
24.35ml
eudiometer
temperature of water 22.98°c
bath before and after
reaction
recorded atmospheric 740 mmhg
pressure
vapor pressure of water 21.1 mmhg
at 22.98°c
density of water at 0.9976 g/ml
22.98°c
density of mercury at 13.534 g/ml
22.98°c
a. if excess hydrogen gas was added to the solid carbon, how many moles of
methane, ch, should be theoretically formed from the reaction? (5pts)
b. based on the data table above, what is the pressure of methane inside the
cudiometer once the reaction is complete? (5 pts)
c. based on the data table above, experimentally determine the amount of moles of
methane formed. how does this value compare to the theoretical amount in a.? (6
pts)
d. which gas, h, h,o, or ch, would be expected to deviate more from ideal gas
behavior? explain your answer. (4 pts)
e. what would the relative ratio of average speed be between h, and h, o? (4 pts)