Question

Temperature also affects the motion of atoms in a gas. Given what you know about temperature, pressure, and volume, which statement is NOT correct?
A) As a gas is heated, the volume increases.
B) As a gas is heated, the pressure increases.
C) As a gas is heated, the pressure decreases.
D) As a gas is heated, energy increases and molecules spread out.

Answer 1

Answer:

C) As a gas is heated, the pressure decreases.

Explanation:

From the choices given, the statement that "as a gas is heated, the pressure decreases is false".

When gases are heated, their molecules expands and the volume of the gas increases. In a fixed container, the pressure of the gases will also increases.

• Gases lack internal cohesion and very weak to no intermolecular forces binding them together.
• When they are subjected to heat, they gain more energy(kinetic energy) which causes them to begin to spread out.
• Thus, they take up even more space allowing volume to increase appreciably.