1.
A balloon occupies a volume of 2.0 L at 40^{o}C. How much volume will it occupy at 30^{o}C?
Correct Answer
B. 1.94 L
Explanation
Make sure you change to Kelvin!! (add 273) or you will get the WRONG answer!!
2.
What is the final pressure in a balloon when the volume is changed from 1.5 L to a volume of 2.5L at constant temperature? (Initial pressure is 1.1 atm).
Correct Answer
A. .66 atm
Explanation
The units will be the SAME on both sides of the equation.
3.
Gas in a balloon occupies 3.3 L. What volume will it occupy if the pressure is changed from 100 kPa to 90 kPa (at a constant temperature of 310 K (about room temperature).
Correct Answer
C. 3.6 L
Explanation
The units will be the SAME on both sides of the equation.
4.
What is the final pressure in a vessel when the volume is changed from 1.3 L to a volume of 1.55 L at constant temperature? (Initial pressure is 1.5 atm).
Correct Answer
A. 1.25 L
Explanation
The units will be the SAME on both sides of the equation.
5.
A balloon occupies 3.2 L at 37^{o}C. How much will it occupy at 42^{o}C?
Correct Answer
B. 3.25 L
Explanation
Make sure you change to Kelvin!! (add 273) or you will get the WRONG answer!! V1/T1 = V2/T2 Charles' law
6.
A gas occupies a balloon with a volume 2.0 L at 33^{o}C. How much volume will it occupy at 37^{o}C, if the pressure remains constant?
Correct Answer
C. 2.06 L
Explanation
Make sure you change to Kelvin!! (add 273) or you will get the WRONG answer!!
7.
A gas expands from a volume 2.0 L at 36^{o}C to a volume of 2.5 L, what is the final temperature, if the pressure is constant?
Correct Answer
A. 386 K ( which equals 113.25 Celsius)
Explanation
Make sure you change to Kelvin!! (add 273) or you will get the WRONG answer!!
V1/T1 = V2/T2 Charles' law
8.
If the air inside a balloon is heated, the volume will:
Correct Answer
A. Increase
Explanation
Temperature and Volume are directly related (Charles' law): When temperature is increased, volume will also increase.
9.
According to the Kinetic Theory of Gases which is true.
Correct Answer
A. Gases are compressible because of the space between particles.
Explanation
According to the Kinetic Theory of Gases, gases are compressible because of the space between particles. This is because gas particles are in constant random motion and have a lot of empty space between them. When pressure is applied to a gas, the particles can be pushed closer together, reducing the volume of the gas. In contrast, in liquids and solids, the particles are much closer together and have less empty space between them, making them less compressible. Therefore, the statement that gases are compressible because of the space between particles is true based on the Kinetic Theory of Gases.
10.
Which of the following describes the relationship between P and V?
Correct Answer
B. Inversely proportional
Explanation
The relationship between P and V is inversely proportional. This means that as one variable increases, the other variable decreases, and vice versa. In other words, when P increases, V decreases, and when P decreases, V increases. There is a consistent and predictable relationship between the two variables, where they vary in opposite directions. This can be represented by the equation P = k/V, where k is a constant.
11.
Boyle's Law expresses the relationship between
Correct Answer
pressure and volume, p and v, volume and pressure, v and p
Explanation
Boyle's Law states that there is an inverse relationship between the pressure and volume of a gas at constant temperature. This means that as the pressure increases, the volume decreases, and vice versa. The variables p and v represent pressure and volume respectively, and the answer correctly states that Boyle's Law expresses the relationship between these two variables. The second part of the answer simply repeats the same information in a different order, stating that Boyle's Law also relates volume and pressure, represented by the variables v and p.
12.
T1/P1 = T2/P2 is Charles's Law
Correct Answer
B. False
Explanation
The given statement, T1/P1 = T2/P2, is not Charles's Law. Charles's Law states that the volume of a gas is directly proportional to its temperature, assuming constant pressure. The correct equation for Charles's Law is V1/T1 = V2/T2. Therefore, the answer is false.