Use q = mcΔT to calculate heat energy transferred.

In the subtopic Calorimetry and enthalpy measurements, this AQA A-Level Chemistry 7405 learning objective focuses on use q = mcΔT to calculate heat energy transferred. It belongs to Energetics, so revision should stay anchored to this exact subtopic rather than drifting into a generic GCSE-level chemistry summary. Approved keywords to use include calculate, transferred, heat, energy. Heat energy transferred. means the amount of thermal energy exchanged during a process, calculated using the formula q = mcΔT Avoid the mistake of students often forget to convert the temperature change (ΔT) into the correct units, leading to inaccurate heat energy calculations; instead, to fix this, always ensure that the temperature change is in degrees Celsius (°C) when using the formula q = mcΔT. For example, if the initial temperature is 25°C and the final temperature is 75°C, then ΔT = 75 - 25 = 50°C. Substitute this value into the formula along with mass (m) and specific heat capacity (c) to find q accurately For exam answers, when calculating heat energy transferred in a calorimetry experiment, always keep the sign of ΔT in mind: a positive ΔT means the system absorbed heat (endothermic, ΔH > 0), while a negative ΔT means the system released heat (exothermic, ΔH < 0)