Advertisements
Advertisements
Question
Explain how heat capacity of a solid can be determined by the method of mixture.
Advertisements
Solution
- The solid object whose specific heat is to be determined is heated and then put in water in a calorimeter.
- Solid object loses heat energy to water and calorimeter till temperature of all three become equal.
- According to principle of heat exchange,
Heat lost by a solid object (Q) = Heat gained by calorimeter (Q1) + Heat gained by water in the calorimeter (Q2)
This means,
mass of the solid object × its specific heat × in its temperature
= (mass of the calorimeter × its specific heat × increase in its temperature) + (mass of the water × its specific heat × increase in its temperature). - Using this equation, if the specific heat of water and calorimeter are known and other physical quantities are measured accurately, the specific heat of solid object can be determined.
APPEARS IN
RELATED QUESTIONS
A geyser heats water flowing at the rate of 3.0 litres per minute from 27 °C to 77 °C. If the geyser operates on a gas burner, what is the rate of consumption of the fuel if its heat of combustion is 4.0 × 104 J/g?
Differentiate between heat capacity and specific heat capacity.
Give one example where high specific heat capacity of water is used as cooling purposes?
Describe a method to determine the specific heat capacity of a solid, like a piece of copper ?
Explain the term boiling point ?
Explain the meaning of green house effect.
What is carbon tax?
Specific heat capacity of a substance A is 3.8 J g-1 K-1 and of substance B is 0.4 J g-1 k-1. Which substance is a good conductor of heat? How did you arrive at your conclusion?
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?
m kg of a substance of specific heat capacity s J/kg °C is heated so that its temperature rises from θ1°C to θ2°C. Write down the expression for the heat Q supplied.
Write an expression for the heat energy liberated by a hot body.
The temperature of a lead piece of mass 400 g rises from 20°C to 50°C when 1560 J of heat is supplied to it. Calculate: Heat capacity of lead piece.
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?
Which of the following substances (A, B and C) has the highest specific beat?
Two metals A and B have specific heat capacities in the ratio 2:3. If they are supplied same amount of heat then
If the mass ratio of metal A and metal B is 3:5 then calculate the ratio in which their temperatures rise.
Conductors have generally high specific heat capacities and insulators have low specific heat capacities.
To study energy exchange between hot and cold objects, the system of both objects is isolated from the environment by keeping them inside ______.
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.
Thermal capacities of substances A and B are same. If mass of A is more than mass of B then:
Which substance will have more specific heat capacity?
Two blocks P and Q of different metals having their mass in the ratio 2 : 1 are given same amount of heat. Their temperature rises by same amount. Compare their specific heat capacities.
