Exothermic and endothermic reactions
What is energy?
Energy is something that allows other things to happen.
What is the meaning of 'thermal'?
Heat.
The reaction between sodium and chlorine.
Sodium chloride
Mass cannot be created. True or false?
True.
What would happen if you burn wood?
It would turn to ash.
What is the meaning of thermic?
The meaning of thermic is 'heat'.
What is the meaning of 'decomposition'?
Decomposition means to deteriorate (break down).
The reaction between two elements to produce silicon dioxide.
Silicon and oxygen
Mass can be destroyed. True or false?
False.
What would happen if you start your stovetop gas?
It would heat your food.
What is the meaning of exo?
Exo means exit.
How long does it take for calcium carbonate to turn cloudy? (thermal decomposition)
283 seconds.
The reaction between potassium and fluorine.
Potassium floride.
It is always conserved in chemical reactions. True or false?
True
What is the starting temperature of the cotton bud?
25 degrees celsius
What is the meaning of Exothermic?
A chemical reaction that releases heat to its surroundings.
How long does it take for zinc carbonate to turn cloudy? (thermal decomposition)
121 seconds
The reaction between two elements to produce water.
oxygen and hydrogine.
If you burn magnesium, you will lose mass. True or false?
False
What is the ending temperature of the cotton bud?
35 degrees celsius
What is the meaning of Endothermic?
A chemical reaction that takes in heat from their surroundings.
Zinc ____ + carbon dioxide = zinc carbonate
Oxide
The reaction between zinc and sulphur.
zinc sulfide.
Total mass of the reactants = _______
Total mass of the products.
Did the cotton bud's temperature increase or decrease?
Increase.