Question
Explain the principle of heat exchange. Ans. Suppose two objects $A$ and $B$ at different temperature $T_1$ and $T_2$ respectively are enclosed in a box of heat resistant material as shown in figure.
✓
Answer
Let $m _1=$ mass of $A , m _2=$ mass of $B _{,} c _1=$ specific heat capacity of $A _1 C _2=$ specific heat capacity of $B$ and $T=$ common temperature attained by $A$ and $B$ after the heat exchange between $A$ and $B$. Here, no heat leaves the box or enters the box from outside. Hence, if $T_1$ $>T_2$, heat energy lost by $A\left(Q_1\right)=$ heat energy gained by $B\left(Q_2\right)$.
$
\therefore m _1 c _1\left( T _1- T \right)= m _2 c _2\left( T - T _2\right)
$
[Note: If $m_1, c_1, T_1, T, m_2$ and $T_2$ are known, $c_2$ can be determined.]
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
DEFINE : Ecosystem:
What is the difference between space and sky?
Write the correct answer in blank boxes.
In humans, if gene B gives brown eyes and gene b gives blue eyes. What will be the colour of eyes of the persons having the following combination of genes?
- Bb.
- bb.
- BB.
In a bisexual flower, inspite of the young stamens being removed artificially, the flower produces fruit. Explain.
An element A from group 14 of the periodic table combines with an element B from group 16.
- What type of chemical bond is formed?
- Give the formula of the compound formed.
A substance X is added to LPG cylinders while filling so as to make the detection of leakage of LPG from the cylinder easy.
- Name the substance X.
- How does substance X make the detection of leakage of LPG easy?
Write one use of wind energy.
- In the past.
- At present.
Why is tidal energy not likely to be a potential source of energy?
Explain why, iron sheets are coated with zinc.