Advertisements
Advertisements
Question
Define heat energy on the basis of kinetic theory of matter.
Advertisements
Solution
Heat energy: On the basis of the kinetic theory of matter, heat energy is defined as the sum total of kinetic and potential energies of all the molecules of a given substance.
APPEARS IN
RELATED QUESTIONS
The temperature rises by 18°F. What is the rise on the Celsius scale?
When a substance having mass 3 kg receives 600 cal of heat, its temperature increases by 10∘C. What is the specific heat of the substance?
Two bodies at different temperatures are placed in contact. State the direction in which the heat will flow.
Name two substances which contract on heating.
State one use of each of the following type of thermometer:
Laboratory thermometer
The following figure shows a copper washer. Explain, giving reasons, whether the following characteristics of the washer increase, decrease, or remain the same when it is heated.
(a) Internal diameter
(b) Volume
(c) Mass
(d) Density
(e) External diameter
Explain the following:
It is cool in the shade, when it is hot outside.
The dimensions of a substance are increased if the temperature of the substance is decreased.
Find the final temperature of a copper rod. Whose area of cross-section changes from 10 m2 to 11 m2 due to heating. The copper rod is initially kept at 90K. (Coefficient of superficial expansion is 0.0021 /K)
What do you mean by thermal equilibrium?
