Physics
If water absorbs 4000 joule heat to increase the temperature of 1 kg water through 1°C then the specific heat capacity of water is :
- 4 Jkg-1°C-1
- 400 Jg-1°C-1
- 4 Jg-1°C-1
- 4.2 Jg-1°C-1
Calorimetry
ICSE 2022
14 Likes
Answer
4 Jg-1°C-1
Reason — Specific heat capacity is the amount of heat energy required to raise the temperature of a substance per unit of mass. 4000 J heat is required to raise the temperature of 1 kg of water through 1°C i.e., 4000 J heat is required to raise the temperature of 1000 g of water through 1°C i.e., 4 J heat is required to raise the temperature of 1 g of water through 1°C. So, specific heat capacity of water is 4J g-1°C-1.
Answered By
9 Likes
Related Questions
A conductor AB is kept along north south direction of the earth above a magnetic needle as shown below. When the key K is closed then:
- the needle will not show any deflection.
- the needle will deflect towards east.
- the needle will turn in the opposite direction i.e. towards south.
- the needle will deflect towards west.
A coil wound around a piece of soft iron can become an electromagnet only when:
- the circuit is open.
- a magnetic compass is present in the vicinity.
- a galvanometer is connected to the circuit.
- a current flows in the circuit.
Water is used in car radiators because :
- it is a good conductor of heat.
- it conducts heat faster as compared to the other substances and cools the engine quickly.
- its specific heat capacity is very low.
- its specific heat capacity is very high so it can cool the engine without a greater increase in its own temperature.
The heaviest nuclear radiation is :
- x-radiation
- α-radiation
- γ-radiation
- β−radiation