3. Copper metal can be produced by heating copper(II)oxide and hydrogen gas( and other product of the reaction is water). If the enthalpy of reaction for this reaction is 130.5 KJ, calculate the heat of reaction for producing 2.0 g of copper metal. /3 4. Predict types of thermochemical reactions fromfollowing diagrams: / 1

5.Predict type of reactions and draw enthalpy diagram / 4 \mathrm{H}_{2} \mathrm{O}(\mathrm{g}) \rightarrow \mathrm{H}_{2} \mathrm{O}(\mathrm{l}), \Delta H=44 \mathrm{~kJ} \text { .b. } \mathrm{CO}(\mathrm{g})+\mathrm{H}_{2}(\mathrm{~g})+\mathrm{O}_{2}(\mathrm{~g}) \rightarrow \mathrm{CO}_{2}(\mathrm{~g})+\mathrm{H}_{2} \mathrm{O}(\mathrm{g})+\text { Energy }