Advertisements
Advertisements
Question
Explain the term energy changes in a chemical change or reaction.
Advertisements
Solution
Energy changes in a chemical reaction:
“Is the difference between the chemical energy of the REACTANTS and the PRODUCTS”.
APPEARS IN
RELATED QUESTIONS
Define endothermic reactions. Give two examples of each.
Identify the endothermic and exothermic reaction.
HCl + NaOH → NaCl + H2O + heat
What do you observe? When
Lead nitrate is heated.
State which type of chemical reaction proceeds with the absorption of heat energy.
State the following reaction whether heat is evolved or absorbed –
water is added to quicklime
Classify the following reaction into Exothermic and Endothermic reactions.
Magnesium ribbon when burned in air, it forms magnesium oxide.
True or False. If false, give the correct answer.
Tarnishing of silver is an example of endothermic change.
Give a scientific reason.
While preparing dilute sulphuric acid from concentrated sulphuric acid in the laboratory, the concentrated sulphuric acid is added slowly to water with constant stirring.
Give scientific reasons.
While preparing dilute sulphuric acid from concentrated sulphuric acid in the laboratory, the concentrated sulphuric acid is added slowly to water with constant stirring.
Give scientific reason.
While preparing dilute sulphuric acid from concentrated sulphuric acid in the laboratory, the concentrated sulphuric acid is added slowly to water with constant stirring.
