Chegg Study Guilded Solutions and S CHEMICAL REACTIONS Using the general propert

Question

Chegg Study Guilded Solutions and S CHEMICAL REACTIONS Using the general properties of reaction enthalpy A chemist measures the enthalpy change H during the following reaction: ple ysn... hhaT Fe(s) + 2 HCI (g)FeCl2(s) + H2(g) dM.-157. kl Use this information to complete the table below. Round each of your answers to the nearest kJ/mol. reaction FeCl 2(s) + H2(x)- Fe(s) + 2HCI(x) 2Feci2(s1+ 2H2(x) 2Fe(s) + 4HC1(z) 4Fe(s) + 8HC1(x) 4FeCI2(s) + 411,W heir kJ 190 hit th kI com ard cal fi... nows ows s- She.. Explanation Check

Explanation / Answer

given

Fe + 2 HCl --> FeCl2 + H2 ,,,, dH = -157 kJ

now for the reaction

FeCl2 + H2 ---> Fe + 2 HCl ,,,, dH = -(-157) kJ = 157 kJ

a) FeCl2 + H2 --> Fe + 2 HCl ,,, dH = 157 kJ

now

2 FeCl2 + 2H2 --> 2 Fe + 4 HCl ,,,,, dH = 2 x 157 = 314 kJ

b) 2 FeCl2 + 2H2 --> 2 Fe + 4 HCl ,,,,, dH = 314 kJ

now for the reaction

4 Fe + 8 HCl --> 4 FeCl2 + H2 ,,,, dH= 4 x (-157) kJ = -628 kJ

c) 4 Fe + 8 HCl --> 4 FeCl2 + H2 ,,,, dH = -628 kJ

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