Advertisements
Advertisements
Question
Write an expression for the heat energy liberated by a hot body.
Advertisements
Solution
Expression for the heat energy liberated by hot body
= mcΔQ i.e., H = mcΔQ
where m is mass, c is specific heat capacity, ΔQ is the change in temperature.
RELATED QUESTIONS
Who shall pay carbon tax ?
Indian style of cooling drinking water is to keep it in a pitcher having porous walls. Water comes to the outer surface very slowly and evaporates. Most of energy needed for evaporation is taken from the water itself and the water is cooled down. Assume that a pitcher contains 10 kg of water and 0.2 g of water comes out per second. Assuming no backward heat transfer from the atmosphere to the water, calculate the time in which the temperature decrease by 5°C. Specific heat capacity of water = 4200 J kg−1 °C−1 and latent heat of vaporization of water = 2.27 × 106 J kg−1.
What are the factors on which the quantity of heat given to a body depends?
Why are athletes advised to put on extra clothes after competing on event?
A piece of iron of mass 2.0 kg has a thermal capacity of 966 J/°C. What is its specific heat capacity in S.I. units?
Derive Mayer’s relation.
Explain why the specific heat capacity at constant pressure is greater than the specific heat capacity at constant volume.
Express the change in internal energy in terms of molar specific heat capacity.
At same temperature and pressure of an ideal gas, ____________.
Two cylinders of equal height and radius are made of copper and aluminum. Which of them conducts heat faster?
