A substance of mass m kg requires a power in | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(B) The power $P$ supplied is used to maintain the substance in the molten state by compensating for the heat lost to the surroundings.When the power

Vedclass · Accepted Answer

$\frac{Pt}{m}$

Vedclass · Answer

(B) The power $P$ supplied is used to maintain the substance in the molten state by compensating for the heat lost to the surroundings.When the power is turned off,the substance solidifies by releasing its latent heat of fusion $L$ over time $t$.The total heat released during solidification is $Q = mL$.The rate of heat loss is $\frac{Q}{t} = \frac{mL}{t}$.Since the power $P$ was required to maintain the molten state,it must be equal to the rate of heat loss: $P = \frac{mL}{t}$.Solving for $L$,we get $L = \frac{Pt}{m}$.

$A$ substance of mass $m \ kg$ requires a power input of $P \ W$ to remain in the molten state at its melting point. When the power is turned off,the sample completely solidifies in time $t \ s$. What is the latent heat of fusion of the substance?

Similar Questions

What are vaporization and boiling point? Explain the process of boiling of water.

At $100^{\circ}C,$ the substance that causes the most severe burn is:

The graph shows the variation of temperature $(T)$ of one kilogram of a material with the heat $(H)$ supplied to it. At $O$,the substance is in the solid state. From the graph,we can conclude that

When $0.93 \, W \cdot h$ of energy is supplied to a block of ice weighing $10 \, g,$ it is found that

Why do we get burnt more by steam than by boiling water at the same temperature?

Vedclass Test Series

Exam Paper Generator

Online Exam Module