Advertisements
Advertisements
Question
Find the odd one out:
Options
Conduction
Convection
Radiation
Expansion
Advertisements
Solution
Expansion
Explanation:
Conduction, convection, and radiation are all ways of heat transport, whereas material expansion is a property.
APPEARS IN
RELATED QUESTIONS
State two factors upon which the heat absorbed by a body depends
How much heat energy is released when 5.0 g of water at 20℃ changes into ice at 0℃? Take specific heat capacity of water = 4.2 J g-1 K-1, Specific latent heat of fusion of ice = 336 J g-1.
State three ways to minimize the global warming.
Study the following procedure and answer the questions below:
1. Take 3 spheres of iron, copper and lead of equal mass.
2. Put all the 3 spheres in boiling water in a beaker for some time.
3. Take 3 spheres out of the water. Put them immediately on a thick slab of wax.
4. Note, the depth that each sphere goes into the wax.
i) Which property of substance can be studied with this procedure?
ii) Describe that property in minimum words.
iii) Explain the rule of heat exchange with this property.
The specific heat capacity of a body depends on _____________ .
State the condition for the flow of heat energy from one body to another.
Explain, why temperature in hot summer, falls sharply after a sharp shower?
Explain, why water is considered as best liquid for quenching thirst?
Answer the following question.
Why do we generally consider two specific heats of a gas?
Solve the following problem.
What is the specific heat of metal if 50 cal of heat is needed to raise 6 kg of the metal from 20°C to 62 °C?
Derive Mayer’s relation.
How much heat energy is necessary to raise the temperature of 5 kg of water from 20°C to 100°C?
Read the passage and answer the questions based on it.
If heat is exchanged between a hot and cold object, the temperature of the cold object goes on increasing due to gain of energy and the temperature of the hot object goes on decreasing due to loss of energy. The change in temperature continues till the temperatures of both objects attain the same value. In this process, the cold object gains heat energy and the hot object loses heat energy. If the system of both the objects is isolated from the environment by keeping it inside a heat-resistant box then no energy can flow from inside the box or come into the box. In this situation, we get the following principle.
Heat energy lost by the hot object = Heat energy gained by the cold object. This is called the ‘Principle of heat exchange’.
- Where does heat transfer take place?
- In such a situation which principle of heat do you perceive?
- How can this principle be explained in short?
- Which property of the substance is measured using this principle?
Numerical Problem.
What could be the final temperature of a mixture of 100 g of water at 90 °C and 600g of water at 20°C.
Which of the following substances (A, B and C) has the highest specific beat?

Which of the substances P, Q, or R has the lowest specific heat? The temperature v/s time graph is shown ______.

Two metals A and B have specific heat capacities in the ratio 2 : 3. If they are supplied the same amount of heat then
Which metal piece will show a greater rise in temperature given their masses is the same?
J/Kg °C is the unit of specific heat capacity.
The difference between the two molar specific heats of gas is 9000 J/kg K. If the ratio of the two specific heats is 1.5, calculate the two molar specific heats.
