@An exothermic reaction is:
One that produces heat energy
One that absorbs heat energy
One where there is no heat energy change

@HCl(aq) + NaOH(aq)  NaCl(aq) + HO(l) The reaction also produces heat energy. This  kind of reaction is called:
An exothermic reaction
A endothermic reaction
An equilibrium reaction

@Heat and energy changes are measured in:
Joules
Kelvins
Degrees celcius

@To break chemical bonds you:
Give heat energy
Remove heat energy
Do not add or remove heat energy

@When chemical bonds are formed:
Energy is released
Energy is taken in
Energy remains unchanged

@If heat energy taken in during a reaction the reaction is:
Endothermic
Exothermic
Stable

@Heat is one form of
Energy
Joules
Light

@In an exothermic reaction a temperature rise is produced because:
More energy is released when new bonds are formed than when old ones break
Less energy is released when new bonds are formed than when old ones break
The products are less stable because they have lost energy

@How is the 'heat change' in a chemical reaction defined?
Difference in the energy between the products and reactants
The total energy of the reactants and the products
The energy of the products only

@Approximately how much energy do teenagers need each day?
11,000 kJ
1,000 kJ
50 kJ
