Final answer:
The specific heat is represented by the symbol 'c' in the formula.
Step-by-step explanation:
In the formula Q = mcΔT, the symbol c represents the specific heat. Specific heat is a property of a substance and measures the amount of heat required to change the temperature of 1.00 kg of the substance by 1.00 °C. It is denoted by c and has units of J/(kg·K) or J/(kg·°C).