Please wait - loading…

Specific Heat Capacity

Description

Mind Map on Specific Heat Capacity, created by anndjan21 on 03/08/2014.
anndjan21
Mind Map by anndjan21, updated more than 1 year ago
anndjan21
Created by anndjan21 over 8 years ago
290
0

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.
                                Show full summary Hide full summary

                                Similar

                                AQA Physics P1 Quiz
                                Bella Statham
                                Physics P1
                                Phoebe Drew
                                Key word flashcards
                                I M Wilson
                                Physics P1
                                themomentisover
                                OCR Gateway Physics - P1
                                Rattan Bhorjee
                                P1 quiz
                                I M Wilson
                                Physics P1
                                WrightW
                                P1- OCR 21ST Century
                                Archana R
                                P1.1 The Transfer Of Energy By Heating Processes
                                killthemoment
                                P1 6 Electromagnetic Waves
                                MrsBoyson
                                AQA Unit One Physics
                                Natalia Cliff