Energetics Flashcards
What is an exothermic reaction
A chemical reaction in which heat energy is given out
What is an endothermic reaction
A chemical reaction in which heat energy is taken in
What is the calorimetry experiment for combustion
Cold water is measured into a small copper can. The starting temperature of the water is recorded. The water is heated using the flame from the burning fuel. The final temperature of the water is recorded.
What is the calorimetry experiment for Neutralisation
Use a measuring cylinder to add dilute hydrochloric acid to a beaker. Dip a clean glass rod into the contents of the beaker. Use it to transfer a drop of liquid to a piece of universal indicator paper on a white tile. Wait 30 seconds, then match the colour to a pH colour chart.
Heat energy change equation
Q = (-) mcΔT
How to find the molar enthalpy change
Q/n
Q = the heat absorbed
n=number of moles
