Question

Which statement is true for a cooling curve?

A) It shows how the temperature of the substance falls as heat is removed.

B) It shows how the temperature of the substance changes when heat is applied.

C) It shows the increase in the average kinetic energy of the particles.

D) It shows how heat absorption affects the motion of particles.


The ideal gas law equation is PV = nRT. If n, R, and T are kept constant, what happens to the volume if pressure is increased?
Question 11 options:

A)

The volume increases

B)

The volume decreases

C)

The volume remains unchanged

D)

The temperature rises


A 20 liter cylinder of helium at a pressure of 150 atm and a temperature of 27°C is used to fill a balloon at 1.00 atm and 37°C. What is the volume of the balloon?
Question 15 options:

A)

2400 Liters

B)

2900 Liters

C)

3000 Liters

D)

3100 Liters

Answer 1

1.It shows how the temperature of the substance falls as heat is removed. 3.Using the ideal gas relationship, we know that:
PV/T = constant
For a fixed amount of gas.

P₁V₁/T₁ = P₂V₂/T₂
V₂ = P₁V₁T₂/T₁P₂
V₂ = (150 x 20 x (27 + 273)) / ((37 + 273) x 1)
V₂ = 2903 L
= 2900 L
The answer is B