Question

Which of these best describes how the kinetic energy of carbon dioxide molecules change as the carbon dioxide is heated?

A. Kinetic energy decreases.


B. Kinetic energy increases.


C. Kinetic energy increases then decreases.


D. Kinetic energy decreases then increases

Answer 1

B.
carbon dioxide molecules have more energy; therefore, the kinetic energy increases

Answer 2

Answer: The correct answer is Option B.

Step-by-step explanation:

Kinetic energy is defined as the energy which is possessed by the motion of a particle. The formula for the kinetic energy follows:

`K.E.=(3)/(2)(R)/(N_A)T`

where, R = Gas Constant

`N_A=\text{Avogadro's Number}`

T = Temperature

From above expression, kinetic energy is directly proportional to temperature of the system

`\text{Kinetic energy}\propto \text{Temperature}`

As the temperature is increases, the kinetic energy of the particles also increases and vice-versa.

In the given question,

The gas (carbon-dioxide) is heated which means the temperature of the gas is increases and hence, the kinetic energy will also be increased.

Hence, the correct answer is Option B.