Question

suggest why it is not important to add an exact mass of zinc powder

Answer 1

Answer:

Temperature changes can also be used to measure energy changes in reactions that take place in solutions.

For example, heat energy is given out to the surroundings when acids and alkalis react together. This is a neutralisation reaction.

Explanation:

I can also tell you Calorimetry method

1.Measure a volume of an acid and place into a polystyrene cup which is placed into a beaker. This ensures that the reaction mixture is well insulated but won’t fall over.

2. Measure the temperature of the acid with a thermometer.

3. Add a measured volume of an alkali to the acid.

4. Measure the temperature rise to calculate the energy change.

Thank you