0. Statistics and General Formulas

Question 1

Percentage change formula

Answer 1

( Final - initial ) / initial x 100

Question 2

Percentage error formula

Answer 2

(Maximum error / measured value recorded ) x 100

Question 3

Specific heat capacity equation

Answer 3

Heat (J) = mass (g) x specific heat capacity (J/g °c) x temperature change

Question 4

Specific latent heat define and formula

Answer 4

Amount of energy needed to change the state of 1kg of a substance

Energy (J) = mass (kg) x latent heat (J/kg)

Specific latent heat of fusion: energy needed to melt 1kg of a substance

Specific latent heat of vaporisation: energy needed to boil and evaporate 1kg of a substance