Heating Curve Review

A heating curve is a graph that represents the phase changes and temperature changes for a substance based on exposure to heat.

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What is a Heating Curve?

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Heating Curve Review

By Giovanna Cano

How to draw a heat curve

​You need:

• Melting and Boiling Points

• Temperature Range​

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Ex: Ice's melting point is 0 C, ​Water's melting point is 100 C.

How to draw a heat curve

​You need:

• Melting and Boiling Points

• Temperature Range​

• States of matter of the substance

  • Phase changes are represented by plateaus​.

  • Temperature changes are presented by upwards slopes.

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Draw

Draw the heat curve for water from 0 C to 100 C. Label all parts of the graph.

After labeling each section you will:

• Calculate the heat for temperature changes (slopes) using Q = cmΔ​T.

  • Where Q = heat, c = specific heat capacity, m = mass, Δ​T = T_f-T_i

• Calculate the heat for phase changes using Q = mΔ​H.

  • Where Q = heat, m = mass, and Δ​H_phase = latent heat of that phase

• You will need to know when to use specific heat of a substance or the latent heat.​

Solving for the heat in the curve

Fill in the Blank

If Ice is heated from -50 C to 80 C. The water will ___ at 0 C.

Open Ended

If you are heating 20 grams of water from 0 C to 120 C. How many steps would you need?

Draw

Calculate the heat for 20 grams of water heated from 0 C to 120 C. Show your work.