Question

Equal masses of iron, water, aluminium and mercury at same initial temperatures
heated uniformly for 5 mins. If the temperatures obtained are
are
1, – mercury, T, – aluminium, T; -- water, T, – iron, then choose the correct
alternative
(1) TT, ST, T
Ver TT, TT
28 T, >T,<T>T
(4) T,<T>T, <T​

Answer 1

Given:

Equal masses of iron, water, aluminium and mercury at same initial temperatures heated uniformly for 5 mins.

To find:

Temperature order for the substances?

Calculation:

The temperature obtained after heating a substance is given as:

$H = mc\Delta T$

$\implies\Delta T = \dfrac{H}{mc}$

For constant H and m:

$\implies\Delta T \propto \: \dfrac{1}{c}$

• So, higher specific heat capacity, lower will be the final temperature of the substance.

$c_{mercury} < c_{aluminium} < c_{water}$

So, final temperature order will be:

$\boxed{T_{mercury} > T_{aluminium} > T_{water}}$

Hope It Helps.