Advertisements
Advertisements
प्रश्न
Solve the following problems:
Equal heat is given to two objects A and B of mass 1 g. Temperature of A increases by 3°C and B by 5°C. Which object has more specific heat? And by what factor?
Advertisements
उत्तर
\[s = \frac{∆ Q}{m ∆ T}\]
Let Q cal of heat is given to both A and B.
For body A,
\[s_1 = \frac{Q}{1 \times 3} = \frac{Q}{3} \text {cal }g^{- 1} {}^o C^{- 1}\]
For body B,
\[s_2 = \frac{Q}{1 \times 5} = \frac{Q}{5} \text { cal } g^{- 1} {}^o C^{- 1}\]
Now,
\[\frac{s_1}{s_2} = \frac{\frac{Q}{3}}{\frac{Q}{5}} = \frac{5}{3}\]
\[ \Rightarrow s_1 = \frac{5}{3} s_2\]
Thus, specific heat capacity of body A is more than body B and by a factor of \[\frac{5}{3}\].
APPEARS IN
संबंधित प्रश्न
What do you understand by the following statements:
The specific heat capacity of lead is 130 Jkg-1K-1.
A solid metal weighing 150 g melts at its melting point of 800 °C by providing heat at the rate of 100 W. The time taken for it to completely melt at the same temperature is 4 min. What is the specific latent heat of fusion of the metal?
Write the expression for the heat energy Q received by the substance when m kg of substance of specific heat capacity c Jkg-1 k-1 is heated through Δt° C.
Two metallic blocks P and Q of masses in ratio 2: 1 are given the same amount of heat. If their temperature rise by the same amount, compare their specific heat capacities.
Name the radiations for which the green house gases are opaque ?
State three ways to minimize the global warming.
The substances like water which have ........... Heat capacity warm up more slowly than substances like iron which have .......... heat capacity.
What is the unit of heat capacity in CGS system?
The farmers fill their fields with water in winter. Give reason.
A substance is in the form of a solid at 0°C. The amount of heat added to this substance and the temperature of the substance are plotted on the following graph:
If the specific heat capacity of the solid substance is 500 J/kg °G, find from the graph, the mass of the substance.
An electric immersion heater is rated 1250 W. Calculate the time in which it will heat 20 kg of water at 5°C to 65°C.
Answer the following question.
Why do we generally consider two specific heats of a gas?
From the options given below the specific heat of _______ is maximum.
Explain how heat capacity of a solid can be determined by the method of mixture.
What is specific heat capacity?
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.
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.
The specific heat capacity of ______ is maximum.
