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.
RELATED QUESTIONS
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)
Write the approximate value of specific heat capacity of water in S.I. unit.
What do you mean by the following statement?
The heat capacity of a body is 50 JK-1?
Water is used in hot water bottles for fomentation. Give a reason.
A heater of power P watt raises the temperature of m kg of a liquid by Δt K in time t s. Express
the specific heat capacity of liquid in terms of above data.
The S.I. unit of specific heat capacity is ______.
State three ways to minimize the global warming.
What is meant by specific heat capacity?
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?
State the condition for the flow of heat energy from one body to another.
Name the substance which has maximum specific heat capacity.
Write the approximate values of the specific latent heat of fusion of ice.
Why is specific heat capacity taken as a measure of thermal inertia?
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?
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 Specific heat capacity of lead.
A. hot solid of mass 60 g at 100°C is placed in 150 g of water at 20° C. The final steady temperature recorded is 25°C. Calculate the specific heat capacity of the solid. [Specific heat capacity of water = 4200 J kg-1 °C-1]
Derive Mayer’s relation.
Which of the following substances (A, B and C) has the highest specific beat?
The molar specific heat of an ideal gas at constant pressure and constant volume is 'Cp' and 'Cv' respectively. If 'R' is the universal gas constant and the ratio 'Cp' to 'Cv' is 'γ' then CV = ______.
A metal ball of heat capacity 50J/°C loses 2000 J of heat. By how much will its temperature fall?
