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chemistry (energy)
energy in chemistry
44 cards·by 23aamo
what is the definition of energy
something that makes something happen
name all 9 types of energy
kinetic, heat, light, gravitational potential, chemical, sound, electrical, elastic,
nuclear
another name for heat energy
thermal
another name for elastic energy
strain
how do you measure energy (spell)
joules
what happens when energy is transeferd
one form of energy turns into another
how can you show transferes
sankey diagrams
before you drop a ball what energy does it have
gpe
why would someone repeat their measurements in a practical
to get a more reliable answer
when you drop a ball what is the gpe transferred into
sound and heat
does heat flow from warmer to cooler objects or cooler to warmer
warmer to coooler
name the three ways heat can be transferd
conduction, convection, radiation
where does conduction occur
solids
what solids conduct best
metals
what are substances that allow heat to flow through them called
conductors
what are substances that do not allow heat to flow through them called
insulators
give an example of an insulator
air or plastic
where does convection happen
liquids and gasses
what are lighter hot particles or cool particles
hot particles
the hotter a substance is the more infrared radiation it gives of true or false
true
are particles involved in convection conduction and radiation
no not in radiation
how can you detect heat energy
thermograms
what si the law of energy
energy cannot be created or destroyed only be changed from one form to another.
how do find out hoe efficient an object is
useful energy divided by total energy input and times it by 1 hundred
what the fossil fuels
coal, oil and natural gas
explain how oils and gasses are fomed
microscopic plants and animals die and fall to the sea bed, layers of sand and mud form on the
top, pressure and high temperature causes oil
how do you obtain oil
drilling
how is coal formed
plants die in swamps and layers of sand, water and mud bury them, pressure and high
temperatures turn the plants into coal
where does the energy in coal ultimately come from
the sun because the sun grow the plants
what are the disadvantages of fossil fuels
non renewable, pollution, harmful to wildlife.
what happens when fossil fuels are burnt
releases carbon dioxide, which adds to the greenhouse effect and increases global warming
what is the greenhouse effect
carbon dioxide forms an atmosphere traps in the heat from the sun
what is the definition of non renewable
canot be replenished and cannot be replaced quickly
what are the 6 types of renewable energies
solar, wind, geothermal, hydroelectric, tidal, wave.
name the advantages of hydroelectric power
no pollution or greenhouse gasses, renewable, can generate electricity and times of high
demand
name the disadvantages of hydroelectric power
expensive to set up, ares need to be flooded and destroyed habitats, only be built in hilly
places
name advantages of tidal power
more predictable the sun and wind, has potential to generate lots of electricity, renewable
name the disadvantages of tidal power
no pollution of greenhouse gasses, expensive to set up
what are the advantages of wind power
renewable, after built very few costs needed
what are the disadvantages of wind power
requires wind, noisy if you live close by, visual pollution, very expensive to set up in the
beginning.
what are the advantages of geothermal power
excellent for countries like newzeland and Ice land preovides renewable energy, no
pollution or greenhouse gasses
what are the disadvantages of geothermal power
only suitable in some locations, cost of drilling
what are the advantages of solar energy
renewable, no pollution, can be used in remote locations
what are the disadvantages of solar energy
very expensive to initially set up, works better on roofs that face to the south.