Feelin' Gassy
If you lower the volume of a container of a gas, what will happen to the pressure?
If a gas fills a nonrigid container to 5 L at 100 C and is heated to 105 C, what is the new volume of that container?
5.06 L
What information does " @STP" give us?
Temp = 0C = 273 K
Pressure = 1 atm
CH4(g) + 5O2(g) --> H2O(g) + 3CO2(g)
How many liters of carbon dioxide does 3.4 L of CH4 produce?
10.2 L CO2
Zn(s) + 2HCl(aq) --> ZnCl2(aq) + H2(g)
Why can't we relate VolumeZinc with VolumeHydrogen?
Zinc is a solid. We can only use the balanced equation for volume ratios when both compounds are gasses.
If you cooled a gas down, how would that affect pressure?
(volume of container stays the same)
speed of molecules will slow, lowering collisions, and decreasing pressure
If a gas is at 0.5 kPa pressure and fills 2.25 L of space, what will the new pressure be if the container shrinks to 1.5 L?
.75 kPa
Hydrogen is at 1 atm and 0 C:
If you have 13 L of hydrogen gas, how many moles of hydrogen is that?
use 22.4 L = 1 mole
0.58 moles
N2(g) + 3F2(g) --> 2NF3(g)
If you have 3 g of N2 at STP, how many g of NF3 will you produce?
15.2 g NF3
What is the molar mass of a compound at 298K, 755 mmHg, and a density of 1.14 g/L?
28.08 g/mol
Draw a graph of pressure( y-axis) vs temperature(x-axis).
-direction of line
-shape of line
straight line, positive slope
A gas is at 4 mm Hg pressure, 30 C and 4L. The temperature is raised to 45 C and the pressure raised to 6 mm Hg. What is the new volume of that gas?
2.8 L
Oxygen is at 1 atm and 273K:
If you have 1,000,000,000,000,000 O2 molecules, that's 1*1015 molecules, how many L of gas is that?
3.72 * 10-8 L
2K(s) + 2H2O(l) --> 2KOH(aq) +H2(g)
How many L of H2 will 2 grams of K produce at 98 kPa and 72 C?
0.75L
What temperature, in C, is a 0.5 mol of a gas at 1.06 atm and 5 L?
-143 C
Draw a graph of volume (y axis) versus pressure (x axis) of a gas.
negative slope,
curved (start with high slope, end with shallow slope)
A gas is at 145 C, fills 6.8 L and is at 99 kPa pressure. What is the temperature of the gas, in C, if the volume is lowered to 5 L and the pressure is lowered to 90 kPa?
279.4 K or 6.4 C
How many grams of water vapor are in 15 L @STP?
12.07 g
Everyone will get a mint if this was NOT the first question picked in this category.
Quit pickin' the tough questions first.
What is the molar mass of a 10 grams of a compound at STP taking up a volume of 3.16 L?
70.9 g/mol