Heating Capacity from Heating Curve

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Heating Capacity from Heating Curve

Postby aTirumalai-1I » Mon Jan 22, 2018 9:31 pm

Hi, I was reading the textbook, and on page 287, it says "The steeper the slope of a heating curve, the lower is the heat capacity." Can someone explain why this relationship is true?

Thanks in advance!

Chew 2H
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Re: Heating Capacity from Heating Curve

Postby Chew 2H » Mon Jan 22, 2018 9:43 pm

Because Heating capacity refers to the amount of temperature required to raise a certain substance by 1 degree celcius, lower heat capacity means higher rise in temperature over once heated. So on the heating curve, the temperature rises higher thus making the slope of the curve steeper.

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Re: Heating Capacity from Heating Curve

Postby mitalisharma2B » Mon Jan 22, 2018 10:21 pm

A steeper slope on a heating curve is indicative of a greater temperature change over a lesser energy expenditure. Heat capacity relates to the amount of energy required to increase the temperature by 1 degree Celsius.

A lower heat capacity will correlate to a steeper slope because it the temperature can be raised much more (high y value) for the same amount of energy (x value) as in a part of the graph with a less steep slope.

In other words, less energy (lower heat capacity) can be used to raise the temperature to the same level as a less steep part of the heating curve.

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