An industrial chemist uses a flow calorimeter to determine the energy released during a continuous neutralization reaction. The temperature of the effluent water stream increases by 13.2∘C13.2^{\circ}\text{C}13.2∘C.
The heat energy transferred to the water stream per minute can be calculated using the equation:
heat energy (J)=840×temperature rise \text{heat energy (J)} = 840 \times \text{temperature rise} heat energy (J)=840×temperature riseCalculate the heat energy, in joules, transferred to the water stream per minute.
94 exam-style questions on Edexcel GCSE Chemistry 8.2 Heat energy changes in chemical reactions, covering 8.2.1 Exothermic and endothermic changes, 8.2.2 Bond breaking, bond making and overall energy change, 8.2.3 Calculating energy change from bond energies, and 8.2.4 Activation energy and reaction profiles. Each one has a worked solution and a mark scheme showing where the marks go.