Beginner Topic 341 of 1102 Thermodynamics & Energetics
Specific Heat Capacity
Heat needed to raise one gram of a substance by one degree Celsius.
Practise Thermodynamics & Energetics All Thermodynamics & Energetics topics
In-depth explanation of Specific Heat Capacity
Specific heat capacity, symbolized c, is the amount of heat needed to raise the temperature of one gram of a substance by one degree Celsius or one kelvin. It is calculated from q equals m times c times delta T, so the heat required depends on the mass of material and the size of the temperature change as well as on the substance. Water has an unusually high specific heat capacity of 4.184 J per gram per degree, because hydrogen bonding allows the liquid to absorb a lot of energy without a large temperature rise. This property makes water an effective buffer against temperature swings in oceans, climates and living organisms. Metals typically have low specific heat capacities and heat up quickly, which is why they are used in cookware.
Going deeper: Specific Heat Capacity
Key ideas: Use q equals m c delta T and rearrange to find any one unknown. Make sure that the temperature change is a difference, so degrees Celsius and kelvin give the same delta T. In mixing problems, set heat lost by the hot body equal to heat gained by the cold one, and solve for the final temperature.
Common mistakes and connections: A frequent mistake is mixing grams and kilograms or using c in J per gram kelvin with mass in kg. Another is forgetting that phase changes add latent heat terms which do not change temperature. Specific heat links to molar heat capacity and to the high heat capacity of water that moderates climate.
Visualization of Specific Heat Capacity
Specific heat capacity of common substances in J per gram per kelvin. Water needs far more heat per degree than metals, which is why it buffers temperature. The interactive lesson shows this as a live animation or chart.
Worked example and use case
Heating 100 g of water by 10 degrees Celsius requires 4184 J of heat, since 100 times 4.184 times 10 gives that value.
Frequently asked questions about Specific Heat Capacity
What is Specific Heat Capacity?
Heat needed to raise one gram of a substance by one degree Celsius.
Is Specific Heat Capacity a beginner, intermediate or advanced topic?
Specific Heat Capacity is a beginner topic in Thermodynamics & Energetics. It needs no earlier chemistry lessons and is a good starting point.
What should I learn before Specific Heat Capacity?
Study these earlier topics in Thermodynamics & Energetics first: Enthalpy, Exothermic Reactions, Endothermic Reactions.
What comes after Specific Heat Capacity?
The next topics in Thermodynamics & Energetics are Molar Heat Capacity and Calorimetry.
Can I practise Specific Heat Capacity with quizzes?
Yes. The interactive lesson includes a self-check question on Specific Heat Capacity, and the Thermodynamics & Energetics quiz draws on every topic in this area.
Where Specific Heat Capacity fits in Thermodynamics & Energetics
Specific Heat Capacity is topic 13 of 91 in Thermodynamics & Energetics.