When magnesium (mg) metal is placed in hydrochloric acid (hcl), it forms magnesium chloride (mgcl2) and a gas. what gas is formed in this reaction?
When magnesium (mg) metal is placed in hydrochloric acid (hcl), it forms magnesium chloride (mgcl2) and a gas. what gas is formed in this reaction?
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.
[tex]\delta h=e_p-e_r[/tex]
[tex]\delta h[/tex]= enthaply
[tex]e_p[/tex] = energy of products
[tex]e_r[/tex] = energy of reactants
as [tex]e_p< e_r[/tex], thus [tex]\delta h[/tex] comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.
Hydrogen gas is formed.
acid + metal = salt + hydrogen
Magnesium in hydrochloric acid forms H2 (hydrogen) gas according to the balanced chemical equation:
Mg + 2HCl→H2 + MgCl2
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explanation: