Energy Transfer by Heating
- Created by: Samuel1746
- Created on: 31-03-15 18:11
View mindmap
- Energy Transfer By Heating
- Infrared Radiation
- The atmosphere doesn't block infrared radiation
- Greenhouse Effect
- Short wavelengths of infrared get through glass
- They heat the object inside and they give off longer wavelengths which cant penetrate glass
- Gases such as water vapour and CO2 keep the infrared radiation in the atmosphere
- Short wavelengths of infrared get through glass
- Evaporation and Condensation
- Evaporation When liquid gets hot enough to become a gas
- Factors affecting rate of evaporation
- Surface area
- Temperater
- Wind
- Factors affecting rate of evaporation
- Condensation Gas lands on a cool surface and becomes a liquid
- Factors affecting rate of condensation
- Surface area
- Temperature
- Factors affecting rate of condensation
- Evaporation When liquid gets hot enough to become a gas
- States of Matter
- There are 3 states, solid liquid and gas
- Solids keep their particles locked in place, keeping its shape
- Liquid particles can move around and have no shape
- Gas particles have much more energy and move around much quicker
- There are 3 states, solid liquid and gas
- Conduction
- Metals conduct better than non-metals
- Metals contain lots free electrons, they move at random in the element
- Free electrons vibrate and make other electrons vibrate
- This causes the vibrations to go along all of the object
- Free electrons vibrate and make other electrons vibrate
- Convection
- Hot air rises, and cool air sinks
- This creates a cycle
- Heat causes the liquid or gas to expand, meaning their less dense
- Only takes place in liquids or gasses
- Hot air rises, and cool air sinks
- Surfaces and Radiation
- Light shiny surfaces emit more radiation than matt dark ones
- Shiny surfaces absorb less but reflect more
- Specific Heat Capacity
- Temperature rise depends on:
- Energy Supplied
- Mass
- What the substance is
- E = m x c x theta
- E = energy transfer in joules
- m = mass in Kg
- c = SHC
- theta = change in temperature
- Temperature rise depends on:
- Infrared Radiation
Comments
No comments have yet been made