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A.) When HBr(g) reacts with Cl 2 (g) to form HCl(g) and Br 2 (g) , 40.6 kJ of en

ID: 914249 • Letter: A

Question

A.) When HBr(g) reacts with Cl2(g) to form HCl(g) and Br2(g) , 40.6 kJ of energy are evolved for each mole of HBr(g) that reacts.

Write a balanced thermochemical equation for the reaction with an energy term in kJ as part of the equation. Note that the answer box for the energy term is case sensitive.

Use the SMALLEST INTEGER coefficients possible and put the energy term (including the units) in the appropriate location.

B.)

When HCl(g) reacts with NH3(g) to form NH4Cl(s) , 176 kJ of energy are evolved for each mole ofHCl(g) that reacts.
Write a balanced thermochemical equation for the reaction with an energy term in kJ as part of the equation. Note that the answer box for the energy term is case sensitive.

Use the SMALLEST INTEGER coefficients possible and put the energy term (including the units) in the appropriate location.

Explanation / Answer

A)

not balanced equation

HBr + Cl2 = Br2 + HCl + HEAT

balance hydrogen and br/cl

2HBr + Cl2 = Br2 + 2HCl + HEAT

B)

HCl + NH3 = NH4Cl Hrxn = -176 kJ

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