Question

Chapter 5 HW 1. Determine whether the following statements are true or false A) Gasses have a high density B) Neon diffuses faster than argon C) Gas pressure is the result of particles of a gas colliding with each other D) Increased temperature of a gas result in increased gas pressure because particles move faster, collide more often and harder with the wall E) Gases are mostly empty space. F) When the temperature of a gas increases, the volume of the gas decreases. 2. A balloon containing helium at constant pressure and temperature has the volume doubled by adding a more helium. Which statement(s) is(are) TRUE? A) The number of helium atoms doubled. B) The number of moles of helium doubled. C) The mass of helium in the balloon doubled. D) All of the statements are true. E) All of the statements are false. 3. The pressure of a gas is 894 torr at 82.0°C, what will be the new pressure if the temperature is lowered to 65.0°C at constant volume? 4. A given mass of nitrogen at room temperature occupies a volume of 4.50 L at 1.25 atm pressure. What will be the volume if the pressure is increased to 2.00 atm?

Answer 1

A) false

Reason: Gases are the least dense state of matter which explains their free moving structure

B) True

Lower molar mass gases diffuse faster, meaning that Neon does diffuse faster

C) True

Reason: This is exactly how pressure is measured, the force exerted by gas molecules on the container walls

D) True

Reason: the [Gay] Lussac gas law states that pressure is directly proportional to temperature

E) True

reason: this is a consequence of their low density, meaning that molecules are more spaced out

F) False

reason: Boyle's law states that Temperature is directly proportional to Volume.