The graph shown in the figure represents change in the temperature of $5 k g$ of a substance with time, as it absorbs heat at a constant rate of $42 k J$ $m i n^{- 1}$ . What would be the latent heat of vapourization of the substance?

630 k J k g^{- 1}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

126 k J k g^{- 1}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

84 k J k g^{- 1}

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

12.6 k J k g^{- 1}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is C $84 k J k g^{- 1}$

$A B$ represents liquid to vapour phase change which occurs for $10 m i n$ and in each minute $42 k J$ of heat is supplied. Thus,
$△ Q = 42 \times 10 = 420 k J$

This heat vapourises $5 k g$ of the substance.
$5 L_{v} = 420 L_{v} = 84 k J k g^{- 1}$ .

Suggest Corrections

Similar questions

Q. The graph shown in the figure represents change in the temperature of

5 k g

of a substance with time, as it absorbs heat at a constant rate of

42 k J

m i n^{- 1}

. What would be the latent heat of vapourization of the substance?

The graph shown in the figure represents change in the temperature of $5 k g$ of a substance with time, as it absorbs heat at a constant rate of $42 k J$ $m i n^{- 1}$ . The latent heat of vapourization of the substance is:

Q. The graph shown in the figure represent change in the temperature of

5 k g

of a substance as it absorbs heat at a constant rate of

42 k J / m i n

. The latent heat of vaporization of the substance is

Q. As a physicist, you put heat into a

500 g

solid sample at the rate of

10.0 k J / m i n

, while recording its temperature as a function of time. You plot your data and obtain the graph shown in figure. What is the latent heat of fusion for this solid in

k J / k g

Q. Consider the heating curve below. the graph represents temperature changes for a substance as heat is added at a steady rate . From the graph what stands out about this substance?

Join BYJU'S Learning Program

The graph shown in the figure represents change in the temperature of 5 kg of a substance with time, as it absorbs heat at a constant rate of 42 kJ min−1. What would be the latent heat of vapourization of the substance?

The correct option is C 84 kJ kg−1 AB represents liquid to vapour phase change which occurs for 10 min and in each minute 42 kJ of heat is supplied. Thus, △Q=42×10=420 kJ This heat vapourises 5 kg of the substance. 5Lv=420Lv=84 kJ kg−1 .

The graph shown in the figure represents change in the temperature of $5 k g$ of a substance with time, as it absorbs heat at a constant rate of $42 k J$ $m i n^{- 1}$ . What would be the latent heat of vapourization of the substance?

The correct option is C $84 k J k g^{- 1}$

$A B$ represents liquid to vapour phase change which occurs for $10 m i n$ and in each minute $42 k J$ of heat is supplied. Thus,
$△ Q = 42 \times 10 = 420 k J$

This heat vapourises $5 k g$ of the substance.
$5 L_{v} = 420 L_{v} = 84 k J k g^{- 1}$ .