Advertisements
Advertisements
प्रश्न
Calculate the amount of heat energy required to raise the temperature of 200 g of copper from 20°C to 70°C. Specific heat capacity of copper = 390 J kg-1 K-1.
Advertisements
उत्तर
Mass of copper m = 200 g
= `200/1000`
= `2/10` kg
Rise in temperature Δ T = (70 - 20) = 50°C
Special heat capacity of copper = 390 J kg-1K-1
Amount of heat energy required Q = mc ΔT
Q = `2/10 xx 390 xx 50`
= 3900 J
APPEARS IN
संबंधित प्रश्न
It is generally cold after a hail-storm then during and before the hail storm. Give reason.
Name two green house gases ?
What is meant by global warming?
650 J of heat is required to raise the temp. of 0.25 kg of lead from 15°C to 35°C. Calculate the Sp. heat capacity of lead.
If, in a central heating system, steam enters a radiation pipe at 100°C and water leaves the radiation pipe at 100°C, can this radiation pipe heat a room? Give an explanation for your answer.
The specific heat capacity of water is 1 cal/g °C.
The value of 'γ' for a gas is given as `gamma = 1 + 2/"f"`, where 'f ' is the number of degrees of freedom of freedom of a molecule of a gas. What is the ratio of `gamma_"monoatonic"//gamma_"diatomic"`?
Diatomic gas consists of rigid gas molecules
A piece of lead weighing 500 g gives out 1200 calories of heat when it is cooled from 100° C to 20° C. Find its specific heat.
The molar specific heats of an ideal gas at constant pressure and volume are denoted by Cp and Cv, respectively. If `gamma = "C"_"p"/"C"_"v"` and R is the universal gas constant, then Cv is equal to ______.
In the method of mixtures, a hot metal is dropped into cold water and the mixture reaches a final temperature. Which principle is used to find the specific heat of the metal?
