Temperature changes Flashcards by Isabella Williams

Q

Matter possesses energy in the form of ………. and ……….. energy

A

kinetic
potential

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Q

Internal energy of system

A

sum of kinetic and potential energy of all particles

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Q

Exothermic

A

Releases energy to surroundings

Temperature rise

∆H = - ve

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Q

Exothermic reactions EX

A

Acids + Metals
Neutralisation
Combustion
Hand warmers
Thermite reaction

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Q

Endothermic

A

Takes energy from surroundings

Temperature drop

∆ = + ve

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Q

Endothermic reactions EX

A

Melting ice
Photosynthesis
Cold packs
Thermal decomposition of group 2 elements

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Q

Endothermic reactions EX

A

Melting ice
Photosynthesis
Cold packs
Thermal decomposition of group 2 elements

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