Variables
What is T2 in this word problem?
"A gas at 3.0atm at 30.0°C fills a flexible container with an initial volume of 2.00L. If the temperature is raised to 80,0°C and the pressure increases to 4.0atm, what is the new volume?"
T2=353
What is volume in regard to gases?
Volume is the space gas particles take up.
If k is a constant, how can we reduce these two equations: k=P1/T1 and k=P2/T2?
P1/T1= P2/T2
Suppose you have 22.4 L of the following gases at STP: neon, Ne, argon, Ar, and xenon, Xe. How many atoms are there in each gas sample?
6.022 x 1023
What are the values of T and P at Standard Temperature and Pressure?
T = 273 K
P =1.00 atm
What is temperature in regard to gases?
Temperature is a measurement of how fast the gas particles move.
If we are solving for V2 from the combined gas law equation, what variables do we want to cancel out?
T2 and P2
Which has more particles, a balloon filled with 10 L of oxygen, O2, gas or a balloon filled with 15L of hydrogen, H2, gas? Assume STP.
15 L of hydrogen gas.
What is a difference between k, K, and T?
k is a constant, K is a unit of measurement, T is a variable.
What is pressure in regard to gases?
Pressure is a measurement of how often the gas particles hit the walls of their container.
If we are solving for P2 from the combined gas law equation, what variables do we want to cancel out?
V2 and T2
At 25oC, which has the greater volume, an oxygen, O2, balloon at 1.2 atm with a mass of 16.0g, or a helium, He, balloon at 1.2 atm with a mass of 2.0 g?
Same volume because temperature and pressure are the same.
What is the difference between a constant and variable?
While a variable changes, constant stays fixed.
Define Avogadro's law
At standard pressure (1.000 atm) and temperature (273 K), 6.02 x 1023 particles of gas occupy a volume of 22.4L.
What does P1 equal from the combined gas law equation?
One person from your team has to demonstrate your group's work to the class.
P1= (P2V2T1)/(T2V1)
What is the volume of gas at 2.00 atm and 200.0 K if its original volume was 300.0 L at 0.250 atm and 400.0 K
V2 = 18.8 L
If Avogadro's law is concerned with amount of gas and volume, what variables must be fixed?
Pressure and Temperature.
What is the formula for density?
Density is mass over volume.
What does T2 in the combined gas law equal?
One person from your team has to demonstrate your group's work to the class.
T2= (P2V2T1)/P1V1
A rigid container has a volume of 500mL at STP. What pressure will cause the temperature inside to be 400K?
P2= 1.47 atm