Specific Heat Capacity and Latent Heat (Physics)

How to tell which formula to use?

Temp changing → SHC | Temp constant (melting/boiling) → Latent Heat ✅

What is SHC

Energy to raise 1kg by 1°C

SHC formula?

🔺E=m x c x 🔺0

Mass given in grams? (SHC)

÷ 1000 → convert to kg FIRST

What is latent heat?

Energy to change state (melt/boil) — temp stays same

Why doesn't temp rise during state change? (SLH)

Energy breaks bonds between particles, NOT speed them up

Latent Heat formula?

E = m × L

Latent Heat of Fusion?

Solid ↔ Liquid (melting / freezing)

Latent Heat of Vaporisation?

Liquid ↔ Gas (boiling / condensing)

What do the SLOPES mean?

(Heating Curve Graph)

Temp rising → particles move faster → (use ΔE = m×c×Δθ)

What do the FLAT LINES mean?

(Heating Curve Graph)

Temp constant → state changing → bonds breaking → use E = m×L

How to calculate total energy for heating + melting?

1) Heat to melting point → ΔE = m×c×Δθ

2) Melt it → E = m×L

3) ADD both energies ✅