University:
Loyola University Maryland
Course:
BL 111 | Environmental Biology
Academic year:

2024
Views:

261

Pages:

2
Author:

Natasya J.

Physical Heat (Q) When heating a substance without a change in state → Q = mcΔT Specific heat capacity (C or Cp), the amount of energy required to raise the temperature of 1 gram of a substance 1 degree celsius. The rate of heat transfer. (J/g°c) C 1 calorie = 4.18 Joules 1.000 Joules = 1KJ 1.000 calories = 1 kilocalorie = 1 calorie (food calorie) H2O = 4.18 J/g°C = 1 cal/g°C The lower the value of the specific heat capacity the faster heat is transferred. The higher the value of the specific heat capacity the slower heat is transferred. At changes of state other equations must be used to determine the amount of energy is used. At Melting Point - ΔH = Hm Heat of Fusion (Hf) - The amount of energy required to boil 1 gram of a solid. (Joules / Cal). At boiling point ΔH . Hm Heat of Vaporization (Hv) - The amount of energy required to boil 1 gram of a solid. (Joules / Cal)