Molar and Specific Heat Capacities Quiz

Play an AI-generated podcast conversation about this lesson

In calorimetry, a system is said to be isolated if ____________.

the system is in thermal equilibrium

there is no change in temperature

the system is at a constant temperature

no heat exchange occurs between the system and its surroundings (correct)

What is the purpose of the outer jacket in a calorimeter?

To reduce heat loss from the inner vessel (correct)

To hold the metallic vessel in place

To provide structural support

To increase heat transfer to the surroundings

Which gas has the highest molar specific heat capacity among the listed gases?

H2

He

N2

CO2 (correct)

What is the principle used when determining the specific heat capacity of a solid using calorimetry?

Heat gained is equal to heat lost Signup and view all the answers

Which material has the highest specific heat capacity among ice, glass, iron, kerosene, edible oil, and mercury?

Ice Signup and view all the answers

What is the function of the metallic vessel in a calorimeter?

To reduce heat loss to the surroundings Signup and view all the answers

What type of system is described in the text when a copper calorimeter containing hot water is placed inside a double-walled vessel?

Isolated system Signup and view all the answers

According to the information provided, why is the graph of log e (T2–T1) against time a straight line with a negative slope?

Because of the heat transfer between the hot water and the surrounding medium Signup and view all the answers

What is the significance of Eq. 10.22 mentioned in the text?

It represents the energy conservation principle in calorimetry Signup and view all the answers

In Example 10.8, when a pan filled with hot food cools from 94 °C to 86 °C in 2 minutes, what is the average temperature change per minute?

3 °C/min Signup and view all the answers

What role does the specific heat capacity constant 'K' play in the cooling process described in Example 10.8?

Determines the rate of temperature change Signup and view all the answers

What is the primary factor that allows heat to flow according to the text provided?

Temperature difference between bodies Signup and view all the answers

What is the specific heat capacity of water in J kg^-1 K^-1?

4.18 × 10^3 Signup and view all the answers

What is the specific heat capacity of copper in J kg^-1 K^-1?

0.386 × 10^3 Signup and view all the answers

In calorimetry, what principle states that the heat lost by one object equals the heat gained by another?

Conservation of Energy Signup and view all the answers

What is the specific heat capacity of the aluminium sphere in kJ kg^-1 K^-1?

0.911 Signup and view all the answers

What is the change in temperature (∆T2) of the water and calorimeter in degrees Celsius?

+3 Signup and view all the answers

What is meant by a 'change of state' in thermodynamics?

A transition from one physical state to another involving an exchange of heat Signup and view all the answers