# Specific Heat Capacity

### Description

Mind Map on Specific Heat Capacity, created by anndjan21 on 03/08/2014.
Mind Map by anndjan21, updated more than 1 year ago
 Created by anndjan21 over 8 years ago
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## Resource summary

Specific Heat Capacity
1. Basics
1. Materials which need to gain lots of energy to warm up also release lots of energy when cooling down – ‘store’ lots of heat.
1. When substance is heated, temp depends on:
1. Amount of energy supplied to it
1. Mass of substance
1. What substance is
2. Specific heat capacity of a substance: energy needed/transferred to 1kg of substance needed to raise its temp by 1°C.
1. Unit for specific heat capacity is joules per kg per °C.
2. Formula: E = m x c x θ
1. Where E = energy transferred in J
1. m = mass in kg
1. c = specific heat capacity in J/kg °C
1. θ = temp change in °C.
1. To find specific heat capacity – rearrange equation: c = E/m x θ
2. Storage Heaters
1. Materials used in them usually have high specific heat capacities to store lots of energy.
1. Water has high specific heat capacity + is liquid so can be pumped in pipes – ideal for central heating.
1. Uses electricity at night (off-peak) to heat special bricks/concrete blocks in heater. Energy transfer from bricks keeps room warm – have high specific heat capacity - store lots of energy. Warm up slowly when heater element is on + cools slowly when off.
1. Some are filled with oil which has specific heat capacity that’s lower than water – often not as good as water -based systems.
1. However oil does have higher boiling point – oil filled heaters can safely reach higher temps than water-based ones.
2. Electricity consumed at off-peak times sometimes charged at cheaper rate – storage heaters designed to be effective.

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