Flashcard 3

Front

What is the identity of the gas that is most likely to be inside balloon #2 if the options are H2, He, CO2, and N2?

Back

CO2

Front

What is the formula to calculate the number of moles of a gas in a rigid container given pressure, volume, and temperature?

Back

n = PV / RT, where n = moles, P = pressure, V = volume, R = ideal gas constant, T = temperature in Kelvin.

Front

What happens to the average speed of gas molecules when the temperature increases?

Back

The average speed of gas molecules increases with an increase in temperature.

Front

What is the relationship between pressure and volume in a gas when temperature is held constant?

Back

According to Boyle's Law, pressure and volume are inversely related (P1V1 = P2V2).

Front

What is STP in terms of temperature and pressure?

Back

STP stands for Standard Temperature and Pressure, which is 273 K (0°C) and 1 atm.

Front

How do you calculate the mass of a gas sample at STP?

Back

Mass = (Number of moles) x (Molar mass of the gas).

Front

What is the average kinetic energy of gas molecules related to?

Back

The average kinetic energy of gas molecules is directly proportional to the temperature of the gas.

Front

What is the ideal gas law equation?

Back

PV = nRT, where P = pressure, V = volume, n = number of moles, R = ideal gas constant, T = temperature.

Front

What does a frictionless piston demonstrate in gas behavior?

Back

A frictionless piston demonstrates how gases exert pressure and can do work when allowed to expand or compress.

Front

What is the significance of the ideal gas constant (R) in calculations?

Back

The ideal gas constant (R) is used in the ideal gas law to relate pressure, volume, temperature, and number of moles.