Skip to content
MathsGenie logo
Quick links
Open app

Course home

  1. GCSE
  3. Chemistry Edexcel
  5. Question bank

Heat energy changes in chemical reactions

EasyMedium
1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980818283848586878889909192939495969798
Question 3

A student investigates the temperature change when potassium chloride dissolves in water.

They use the following method:

  1. Pour 50 cm3 of water into a polystyrene cup.
  2. Add 5.0 g of potassium chloride and stir the mixture.
  3. Record the minimum temperature reached.

Diagram showing a thermometer resting inside a polystyrene cup containing water, placed inside a protective glass beaker.

The student cannot work out the temperature decrease using this method.

State what the student must do before Step 2 to be able to work out the temperature decrease.

[1]

Heat energy changes in chemical reactions Questions

  1. GCSE
  2. /Chemistry
  3. /Heat energy changes in chemical reactions

Question bank