Advertisements
Advertisements
प्रश्न
The cold object the hot object enclosed in one box of heat-resistant material.
- What changes will occur in the two objects when temperature flows from those objects?
- Which principle can show that the energy exchange takes place between two objects only when kept in isolated system?
Advertisements
उत्तर
1. Temperature of cold object increases due to gain of heat energy.
2. At the same time, temperature of hot object decreases due to loss of heat energy.
3. The process of heat exchange continues till both the objects acquire the same temperature.- Principle of heat exchange can show that the energy exchange takes place between two objects only when kept in isolated system.
APPEARS IN
संबंधित प्रश्न
A solid of mass 50 g at 150 °C is placed in 100 g of water at 11 °C when the final temperature recorded is 20 °C. Find the specific heat capacity of the solid. (specific heat capacity of water = 4.2 J/g °C)
Calculate the mass of ice required to lower the temperature of 300 g of water 40°C to water at 0°C.
(Specific latent heat of ice = 336 J/g, the Specific heat capacity of water = 4.2J/g°C)
It is generally cold after a hail-storm then during and before the hail storm. Give reason.
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.
Name two green house gases ?
Read the following paragraph and answer the questions.
|
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 the 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 (meaning that the energy exchange takes place between the two objects only), then no energy can flow from inside the box or come into the box. |
- Heat is transferred from where to where?
- Which principle do we learn about from this process?
- How will you state the principle briefly?
- Which property of the substance is measured using this principle?
What is the specific heat capacity of melting ice?
Give one example where high specific heat capacity of water is used as cooling.
The substances like water which have ........... Heat capacity warm up more slowly than substances like iron which have .......... heat capacity.
A burner raises the temperature of 360 g of water from 40°C to 100°C in 5 minutes. Calculate the rate of heat supplied by the burner.
State, with reason, which of the two, boiling water or steam both at 100°C will produce more severe burns.
A liquid X has specific heat capacity higher than the liquid Y. Which liquid is useful as heat reservoir to keep juice bottles without freezing?
Name the substance which has maximum specific heat capacity.
Is it possible to condense the water formed, back to ice by adding ice at 0°C. Explain with reason.
Some heat is provided to a body to raise its temperature by 25°C. What will be the corresponding rise in temperature of the body as shown on the Kelvin scale?
Answer the following question.
Why do we generally consider two specific heats of a gas?
Derive Mayer’s relation.
For a gas `"R"/"C"_"v" = 0.4,` where 'R' is the universal gas constant and 'Cv' is molar specific heat at constant volume. The gas is made up of molecules which are ______.
A metal ball of heat capacity 50J/°C loses 2000 J of heat. By how much will its temperature fall?
