gas laws Flashcards
(29 cards)
What is Boyle’s Law?
Boyle’s Law states that the pressure of a gas is inversely proportional to its volume at constant temperature. Formula: P1V1 = P2V2.
What does Charles’s Law state?
Charles’s Law states that the volume of a gas is directly proportional to its absolute temperature at constant pressure. Formula: V1/T1 = V2/T2.
What is the formula for the Ideal Gas Law?
The Ideal Gas Law is PV = nRT, where P is pressure, V is volume, n is the number of moles, R is the gas constant, and T is temperature.
True or False: The Ideal Gas Law applies to real gases under all conditions.
False. The Ideal Gas Law is an approximation that is most accurate under low pressure and high temperature.
What is Avogadro’s Law?
Avogadro’s Law states that equal volumes of gases, at the same temperature and pressure, contain an equal number of molecules. Formula: V1/n1 = V2/n2.
Fill in the blank: The combined gas law is expressed as ______.
P1V1/T1 = P2V2/T2.
What does Gay-Lussac’s Law describe?
Gay-Lussac’s Law states that the pressure of a gas is directly proportional to its absolute temperature at constant volume. Formula: P1/T1 = P2/T2.
What is the gas constant (R) value in the Ideal Gas Law?
The gas constant R is 0.0821 L·atm/(K·mol).
True or False: Temperature must always be in Kelvin when using gas laws.
True.
What happens to gas volume when temperature increases at constant pressure?
The volume of the gas increases.
Fill in the blank: According to Boyle’s Law, if the volume increases, the pressure ______.
decreases.
What is the relationship between pressure and volume in Boyle’s Law?
They are inversely proportional.
In Avogadro’s Law, what does ‘n’ represent?
‘n’ represents the number of moles of the gas.
What is the significance of the Kelvin scale in gas laws?
The Kelvin scale is used because it starts at absolute zero, ensuring that gas laws hold true.
What is the effect of decreasing volume on pressure according to Boyle’s Law?
Decreasing volume increases pressure.
Fill in the blank: The law that relates pressure and temperature is ______.
Gay-Lussac’s Law.
What is the combined gas law used for?
It is used to relate pressure, volume, and temperature of a fixed amount of gas.
True or False: The Ideal Gas Law can be used to predict the behavior of gases at very high pressures.
False.
What is the relationship between volume and temperature in Charles’s Law?
They are directly proportional.
What does the term ‘absolute zero’ refer to?
Absolute zero is the theoretical temperature at which a substance has no thermal energy, equivalent to 0 K.
How does increasing temperature affect gas pressure at constant volume?
Increasing temperature increases gas pressure.
Fill in the blank: According to Charles’s Law, if the temperature decreases, the volume ______.
decreases.
What is the main assumption behind the Ideal Gas Law?
Gas particles are in constant random motion and occupy no volume with no intermolecular forces.
What does the term ‘molar volume’ refer to?
Molar volume refers to the volume occupied by one mole of a gas at standard temperature and pressure (STP), approximately 22.4 L.
