10■Second Exam Tricks for Specific Heat Capacity
(IGCSE / WAEC / NECO)
Key Formula: Q = mc∆T
Q = heat energy (J), m = mass (kg), c = specific heat capacity (J/kg°C), ∆T = temperature change
(°C).
Quick Exam Tricks:
1 Memory trick: Heat = mass × capacity × temperature change.
2 Triangle method: Q on top, m and c∆T at the bottom to quickly rearrange formulas.
3 Always calculate temperature change: ∆T = final temperature − initial temperature.
4 Convert grams to kilograms: divide by 1000 (e.g., 500 g = 0.5 kg).
5 Memorize water’s specific heat capacity: 4200 J/kg°C.
6 Break multiplication into easier steps (e.g., 2 × 30 = 60, then 60 × 900).
7 Words like 'energy supplied', 'heat absorbed', or 'heater energy' all mean Q.
8 Check if your answer is reasonable: heating water usually requires thousands of joules.
9 Calculator order: multiply m × c × ∆T step■by■step to avoid typing errors.
10 Fast mental method: multiply the easiest numbers first before multiplying by c.
(IGCSE / WAEC / NECO)
Key Formula: Q = mc∆T
Q = heat energy (J), m = mass (kg), c = specific heat capacity (J/kg°C), ∆T = temperature change
(°C).
Quick Exam Tricks:
1 Memory trick: Heat = mass × capacity × temperature change.
2 Triangle method: Q on top, m and c∆T at the bottom to quickly rearrange formulas.
3 Always calculate temperature change: ∆T = final temperature − initial temperature.
4 Convert grams to kilograms: divide by 1000 (e.g., 500 g = 0.5 kg).
5 Memorize water’s specific heat capacity: 4200 J/kg°C.
6 Break multiplication into easier steps (e.g., 2 × 30 = 60, then 60 × 900).
7 Words like 'energy supplied', 'heat absorbed', or 'heater energy' all mean Q.
8 Check if your answer is reasonable: heating water usually requires thousands of joules.
9 Calculator order: multiply m × c × ∆T step■by■step to avoid typing errors.
10 Fast mental method: multiply the easiest numbers first before multiplying by c.
