Question

25 points question.

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Question:

Observe the given diagram very carefully.

Which of these statements is incorrect? Why?


a. Processes I, II and III are endothermic while Processes IV, V and VI are exothermic.


b. Water vapours formed during process II when come in contact with the skin give out
$22.5 \times {10}^{5}$
J/kg more heat than boiling water.


c. Latent heat for process I is
$3.34 \times {10}^{5}$
J/kg.

d. None of these.

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Answer 1

It's answer will be 4. None of these because Every condition is true.

Let's see
1. Endothermic process is the process in which system absorb the heat from surrounding Hence I, II and III are absorbing heat to change their state of matter. Exothermic Process is just opposite to Endothermic process, It gives out heat So IV,V,VI are giving out heat.

2. Water is heated to form water vapour, This is called Evaporation. Water vapour takes the latent heat from Water while boiling. It is hotter than Boiling water.

3. Latent heat of Ice is 3.34x10^5. It is also correct because 1 Kg of ice required 3.34x10^5 Heat energy to convert into Water.

Hence,
Conclusion:- By watching all the cases we see Option IV is incorrect.