3. (C) Hydrogen reacts with chlorine to form hydrogen chloride.
H (9) + Cl (9) ► 2HCl(9)
The reaction is exothermic.
Draw and label the reaction profile diagram for this reaction, identifying the
activation energy.
(3)
heat energy
progress of reaction

Read the chemical equation. 2c2h2 + 5o2 → 4co2 + 2h2o which of the following statements would be correct if one mole of c2h2 was used in this reaction? one mole of oxygen was used in this reaction. five moles of oxygen were used in this reaction. four moles of carbon dioxide were produced from this reaction. two moles of carbon dioxide were produced from this reaction.