Internal Energy & Energy Transfers (AQA GCSE Physics Combined Science): Flashcards

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Specific latent heat
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Specific latent heat definition

Energy needed to change state of 1 kg of substance

Temperature during state changes

Stays constant

Where energy goes during state changes

Breaking/making bonds between particles

Specific latent heat of fusion

Energy for solid-liquid state changes

Water's specific latent heat of fusion (J/kg)

334,000 J/kg

Specific latent heat of vaporisation

Energy for liquid-gas state changes

Water's specific latent heat of vaporisation (J/kg)

2,260,000 J/kg

Formula for energy in state changes

E=m×LE = m \times L

Vaporisation vs fusion energy

Vaporisation needs more (about 7×7\times for water)

Temperature of ice while melting

Stays at 0°C

Temperature of water while boiling

Stays at 100°C

What does LL represent in E=m×LE = m \times L

Specific latent heat (J/kg)

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