When 2 moles of solid calcium, Ca, combines with 1 mole of oxygen gas, O2, 2 moles of solid calcium oxide, CaO, is formed and 1200 kJ of heat is released. Inh nhan
a) Write the thermochemical equation for the above combustion reaction.?
b) Is the above reaction exothermic or endothermic?
Justify your answer in simple world
a) The thermochemical equation for the combustion reaction is:
2Ca(s) + O2(g) -> 2CaO(s) + 1200 kJ
b) The above reaction is exothermic. This is because heat is released in the reaction, as indicated by the 1200 kJ of heat being released. In an exothermic reaction, the products have a lower energy than the reactants, and the excess energy is released in the form of heat.
a) The thermochemical equation for the combustion reaction is:
2Ca(s) + O2(g) -> 2CaO(s) + 1200 kJ
b) The reaction is exothermic. This is because heat is released during the reaction. In simple terms, when the reactants (Ca and O2) combine to form the product (CaO), the reaction releases heat energy, indicating an exothermic reaction.
a) To write the thermochemical equation for the given combustion reaction, we need to understand the stoichiometry of the reaction.
From the given information, we know that 2 moles of solid calcium, Ca, combine with 1 mole of oxygen gas, O2, to form 2 moles of solid calcium oxide, CaO. Additionally, it is mentioned that 1200 kJ of heat is released.
Based on this information, we can write the thermochemical equation as follows:
2 Ca(s) + O2(g) -> 2 CaO(s) + 1200 kJ
The equation represents the balanced reaction and includes the energy change of 1200 kJ.
b) The given reaction is exothermic. In an exothermic reaction, heat is released to the surroundings. In this case, 1200 kJ of heat is released, indicating an exothermic process. The positive sign of the energy change (1200 kJ) indicates that energy is released during the reaction, resulting in a decrease in energy in the system.