Question

A)

Given the following heat capacities of materials, which one, assuming equal mass and temperature changes, would be best able to store the smallest amount of thermal energy?

Group of answer choices

100 J/(kg °C)

0.1 J/(kg °C)

1 J/(kg °C)

1000 J/(kg °C)

B)

Given the following heat capacities of materials, which one, assuming equal mass and temperature changes, would be best able to store the largest amount of thermal energy?

k is the metric prefix for 1000

Group of answer choices

0.1 J/(kg °C)

0.1 J/(g °C)

10 kJ/(g °C)

0.1 kJ/(g °C)

C)

For an ideal gas, moving in three dimensions at 1000 000K, molecules of the gas:

Group of answer choices

are twice as massive as they are at room temperature

have a negligible amount of kinetic energy when compared to room temperature

exert a smaller amount of pressure when compared to room temperature

have a larger amount of kinetic energy when compared to room temperature

Answer 1

Specific Heat Capacity of the material is a measure of it's ability to store heat. Greater the specific heat capacity, greater will be its ability to store heat.

A) out of given options, lowest specific heat capacity is 0.1 J/ Kg°C ( 2nd option). This will store lowest heat.

B) out of the given options, highest specific heat capacity is 10 kJ/g°C (3rd option). This stores maximum heat.

c) Kinetic energy of the molecules is directly proportional to temperature.

K.E = (3/2) Kb T where Kb - Boltzmann constant & T- Temperature.

So last option is right.