Physics, asked by subhampatro11p8vq94, 11 months ago

which one is correct

Attachments:

Answers

Answered by sattu37

b. ice melts. exothermic reaction

explain-
the ice will be usually found in the solid state, and when it starts to melt, slowly it turns into the liquid state. At that point, heat energy will be released into the air completely.

birajpandey182: Sorry but ans is when water vapour is condensed

sattu37: no, you can google it

sattu37: when ice melt there is EXOTHERMIC REACTION

TPS: Ice needs to absord energy to get converted into water. It's endothermic

TPS: confidence is good, but be 100% sure that you are correct

sattu37: you r right, sorry

Answered by TPS

5. Answer: D

Heat is liberated when water vapour condenses.

Water vapour has higher energy than water. When vapour is converted to water, the excess energy goes to the surrounding.

___________________

1. Time temperature graph has higher slope at the beginning and the slope decreases gradually.

It means that the rate of cooling is higher initially, when the temperature difference of liquid and surrounding is high.

the rate of cooling is slower later when the temperature difference of liquid and surrounding is low.

That means greater the temperature difference, higher the rate of cooling

Previous Question

Next Question