1) _______________reaction released the heat to the surrounding. a) exothermic b) endothermic 2) All of the examples are chemical changes in exothermic reaction EXCEPT: a) rusting b) freezing c) neutralisation d) precipitation 3) which example for endothermic reaction is wrong? a) melting b) sublimation c) dissolving ammonium salts 4) The energy of the products is lower than the total energy of the reactants a) exothermic reaction b) endothermic reaction 5) temperature of the surrounding decreases. a) exothermic reaction b) endothermic reaction 6) An energy level diagram it is a graph that shows the _________________________ in a chemical reaction. a) energy bar b) energy level c) energy change d) total energy 7) A chemical reaction involves bond breaking and bond formation. Which one always requires energy ? a) bond breaking b) bond formation 8) Energy absorb for bond breaking is more than energy released from bond formation. what is the heat change value? a) negative b) positive 9) name the content in cold pack in the endothermic reaction. a) calcium chloride b) magnesium sulphate c) ammonium nitrate 10) What is lye? a) sodium oxide b) sodium sulphate c) sodium nitrate d) sodium hydroxide 11) The heat change when one mole of a metal is displaced from its salt solution by a more electropositive metal. a) Heat of displacement b) Heat of neutralisation c) Heat of precipitation d) Heat of combustion 12) The heat change when one mole of water is formed from reaction between an acid and an alkali a) Heat of precipitation b) Heat of neutralisation c) Heat of combustion d) Heat of displacement 13) The heat change when one mole of a precipitate is formed from their ions in aqueous solution a) Heat of displacement b) Heat of Neutralisation c) Heat of precipitation d) Heat of combustion 14) The heat change when one mole of a substance is completely burnt in oxygen under standard conditions a) Heat of Combustion b) Heat of displacement c) Heat of precipitation d) Heat of neutralisation

Thermochemistry 1

by
Print
Embed

Leaderboard

Visual style

Options

Switch template

Continue editing: ?