Menu

Heating Curves

Part of the Energy, Rates and Equilibrium section of Coddy's Chemistry journey. Lesson 11 of 35.

A heating curve: the temperature rises, stays flat while the substance melts, rises, and stays flat while it boils.

Temperature of water against time while it is heated at a steady rate: it rises, stays flat at 0 °C while the ice melts, rises again, and stays flat at 100 °C while it boils

Heating ice to steam: flat steps while it melts and boils

On a slope the energy speeds the particles up:

$q = m \times c \times (T_2 - T_1)$

$c$ , the specific heat, is the energy to warm 1 g by 1 K: water $4.18\ \mathrm{J/(g·K)}$ .

Challenge

A kettle warms $200\ \mathrm{g}$ of water from $293\ \mathrm{K}$ to $353\ \mathrm{K}$ . Water's specific heat is $4.18\ \mathrm{J/(g·K)}$ . How much energy $q$ , in kJ, does the water take in?

Try it yourself

Physics diagram: beaker

Solve for $q$

Test yourself

This lesson includes a short quiz. Start the lesson to answer it and track your progress.

All lessons in Energy, Rates and Equilibrium

1Energy in Reactions

Exothermic and Endothermic Energy Diagrams Enthalpy Change Activation Energy Recap - Hand Warmer

4Rates of Reaction

Collision Theory Concentration and Rate Temperature and Rate Surface Area Catalysts Recap - Speed Trials

7Practice Problems

Recap - Methanol Plant Recap - Butane Lighter Recap - Limestone Kiln

2Bond Energies

Breaking and Making Bonds Delta H from Bond Energies Hess's Law Energy and Moles Recap - Fuel Value

5Equilibrium

Reversible Reactions Dynamic Equilibrium The Equilibrium Constant Writing K Solids and Liquids in K Recap - K Builder

3Changes of State

Heating CurvesMelting and Boiling Energy of State Changes Recap - Ice to Steam

6Changing an Equilibrium

Le Chatelier's Principle Changing Concentration Changing Pressure Changing Temperature The Haber Process Recap - Factory Settings