Determine whether the following reactions or endothermic or exothermic.
Experiment Place in foam
cup
1
2
3
4
Place 10 cm3
Sodium
hydroxide
(NaOH)
Place 10cm3
copper
sulphate
(CuSO4)
Place 10cm3
water
Initial
Add to the foam
temperature cup
before
reaction
Add 10cm3 of
hydrochloric
acid (HCl)
Place 10cm3
water
New
temperature
after class
time
Add 1 spatula
magnesium
powder
Add 1 spatula
ammonium
nitrate
Add 1 spatula of
calcium chloride
Focus questions:
1. Did the temperature increase or decrease after the reaction?
2. Was heat released or absorbed?
3. Did the cup feel warm or cold after the experiment?
Is the reaction endothermic or exothermic?
Endothermic
or
exothermic?