Weather
What instrument measures atmospheric pressure?
barometer
Which gas law would you use to determine the volume of a beach ball at 2atm if the volume is 2L at 4atm?
P1V1=P2V2
PV=nRT
P1V1T1=P2V2T2
P1V1=P2V2
What is 41 degrees Farenheit in Celsius?
5 degrees Celsius
When climbing a mountain, the temperature will ___________ as your altitude ___________.
decrease, increase
If you have one balloon with 14L He and one balloon with 14L H2 (same temperature and pressure), will volumes be the same?
Yes because both balloons have 14L in volume
Which of the following are phase changes?
condensation, evaporation, expansion, sublimation
all except expansion are phase changes
If the pressure of gas stays the same, temperature __________ as volume decreases
decreases
What is 350 Kelvin in Celsius?
77 degrees Celsius
The pressure of gas and the volume of gas in an enclosed container at constant temperature are
indirectly proportional to each other
If you have one balloon with 14L He and one balloon with 14L H2 (same temperature and pressure), do the balloons have the same number of particles?
Yes. According to Avogadro's hypothesis, equal volumes of gas at the same temperature and pressure will have the same number of particles.
What phase change occurs when it rains?
condensation
What happens to volume and density of a gas as the temperature decreases?
volume decreases, density increases
What is the volume of gas produced when 10ml of solid carbon dioxide sublimes?
*density of solid carbon dioxide= 1.56g/mL and density of carbon dioxide gas at STP= 0.0019g/mL
8.2L
Heat released by _________ of water from the ocean can be a possible souce of energy that causes ________ in a hurricane
evaporation, winds
If you have one balloon with 14L He and one balloon with 14L H2 (same temperature and pressure), do they have the same number of atoms?
No. The H2 balloon has twice as many atoms because it has two atoms per particle. The He balloon has one atom per particle.
Which contains the least mass of water: snow, ice, liquid water, or water vapor?
water vapor
If the volume of a gas decreases, the pressure will _________ because ___________________.
*temperature constant
increase, molecules strike the walls of the container more often.
What will the volume of a balloon be at 1.7atm of pressure if the volume of the ballon is 0.40L at 2.0atm?
*temperature remains constant
0.47L
A balloon with an internal temperature of 37 degrees Celsius and holding 250L of helium is left in the sun. The temperature rises to 65 degrees Celsius. Calculate the new volume.
270.4L
Use Charles's Law which is k=V/T
V=250L T= 310K k=0.8
After being in the sun you have T=338K and you know that k= 0.8.
V=kT
V=0.8 x 338
V= 270.4
If you have one balloon with 14L He and one balloon with 14L H2 (same temperature and pressure), will they have the same mass?
No. He atoms are bigger than H2 atoms so the He balloon will have a bigger mass.
Why are areas of low pressure associated with rain?
As pressure decreases, air rises and cools, causing water vapor to condense
moving
How many moles of O2 molecules are in 100g of O2 gas?
3.1mol
If a bike tire has a pressure of 4atm and the temperature is 37 degrees Celsius, how many moles of air are in the tire if the volume is 8L?
1.26 moles
Use the Ideal Gas Law PV=nRT (R is a constant- 0.082)
4*8=n (0.082) (310K)
32=n*25.4
1.26=n
Calculate the number of molecules in 5 mol of ammonia, NH3
1 mol= 6.2*1023
5* (6.2*1023)= 3.01*1024