Question

Water is being heated to increase its temperature by 50oF. Which situation requires the most heat?...

Water is being heated to increase its temperature by 50oF. Which situation requires the most heat?

Heating from 40oF to 90oF
Heating from 20oF to 70oF
Heating from 150oF to 200oF
Heating from 100oF to 150oF
There is no difference as it is a 50oF rise in each case
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Homework Answers

Answer #1

Option E is the answer

This is because boiling point of water in °F is 212°F

At this temperature , the best supplied doesn't increase the temperature but is used to break the intermolecular forces of interaction and hence at this transition temperature maximum heat is provided to raise the temperature from 50°

But here these changes are taking place below the boiling point and therefore it doesn't matter as the difference is 50° in all cases.

Also C=Q/m ∆T

C is specific heat and q is heat , m is mass and ∆T is change in temperature. C is same , m is same and ∆T is same therefore q will also be same .

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