specific heat capacity
Specific Heat Capacity is a physical property of materials that measures the amount of heat
energy required to raise the temperature of a unit mass of the substance by one degree Celsius
(°C) or one Kelvin (K). It is an intensive property, meaning it does not depend on the quantity or
size of the material.
Formula
The specific heat capacity (
) is calculated using the formula:
Where:
= Heat energy supplied (in joules, J)
= Mass of the substance (in kilograms, kg)
= Change in temperature (in °C or K) [1] [2] [3] .
Units
The standard units of specific heat capacity are:
Joules per kilogram per degree Celsius (
) or
Joules per kilogram per Kelvin (
) [1] [2] [4] .
Typical Values
Specific heat capacity varies across materials. For example:
Water:
(at 20°C)
Ice:
Iron:
Hydrogen gas:
[5] [4] .
Applications
1. Thermal Regulation: Water's high specific heat capacity makes it effective in moderating
temperature changes in environments and living organisms.
2. Engineering and Design: Understanding specific heat is crucial for designing heating and
cooling systems.
3. Calorimetry: Used to measure energy changes in chemical reactions and phase
transitions [1] [4] .
Special Cases
During phase transitions (e.g., melting or boiling), the specific heat capacity is undefined
because heat energy changes the state rather than raising the temperature.
For gases, specific heat capacities differ under constant pressure (
) and constant volume (
). Their ratio (
) is important in thermodynamics [5] [3] .
⁂
1. https://www.superprof.co.uk/resources/academic/academic-science/physics-academic-science/physic
s-gcse/what-is-specific-heat-capacity.html
2. https://www.omnicalculator.com/physics/specific-heat
3. https://byjus.com/chemistry/heat-capacity-and-specific-heat-capacity/
4. https://energyeducation.ca/encyclopedia/Specific_heat_capacity
5. https://en.wikipedia.org/wiki?curid=28420