Advertisements
Advertisements
Question
Two substances A and B have specific heats c and 2 c respectively. If A and B are given Q and 4Q amounts of heat respectively, the change in their temperatures is the same. If the mass of A is m, what is the mass of B?
Advertisements
Solution
Let the mass of B = M.
Let the change in temperature be T for both the bodies, A and B.
The amount of heat in a body is given as
Q = m × c × Δ T
For body A,
Q = m × c × T
`=> "T" = "Q"/("mc")` ...(i)
For body B,
4Q = M × 2c × T
`=> "M" = (4"Q")/(2"c" xx "T")`
From (i), T = `Q/(mc)`
`=> "M" = (4Q)/(2c xx Q/(mc)) = 2m`
RELATED QUESTIONS
Temperature is the measures of the ______ Kinetic energy of the atoms in a substance.
A bridge is made from 20 m long iron rods. At temperature 18∘C, the distance between two rods in 0.4 cm. Up to what temperature will the bridge be in good shape?
Who am I?
I make things hot or cold.
Fill in the blank with the correct word, from the words in option:
All the temperature on the kelvin scale are in ____ figures.
Define coefficient of linear expansion. Write its SI unit.
Why do telephone wires sag during summer?
State three main characteristics of a thermometric substance.
Where am I?
The mean annual temperature is 25°C around me.
If the temperature of a liquid in a container is decreased, then the interatomic distance will ______.
