H. Study the chemical equation below and answer the questions that follow. Na2CO3 (aq) + H2SO4 (aq) → Na2SO4 (aq) + CO2(g) + H20 (1)
What volume of 0.5 mol L sulphuric acid is needed to react with 21.2 g of Na2CO3 (molar mass
of Na2CO, is 105.99)?
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answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.