Δ H has to be determined for the reaction, H 2 ( g ) + C l 2 ( g ) → 2 HCl ( g ) . Concept Introduction: According to Hess’s Laws, change in enthalpy in an overall reaction can be calculated from the change in enthalpy of other reactions. If an equation is obtained by the addition of more than one thermochemical equations, then the enthalpy change of that equation is the sum of change in enthalpy of all the equations added. If an equation is the reverse direction of a thermochemical equation, then the change in enthalpy has same numerical value but opposite sign. The enthalpy change depends on the mass of reacting substance. If the coefficients present in an equation is multiplied with a factor, then change in enthalpy also should be multiplied with that same factor.

Question

Draw the structure of A, the minor E1 product of the reaction. Cl Skip Part Check F1 esc CH_CH OH, D 3 2 Click and drag to start drawing a structure. 80 R3 F4 F2 F3 @ 2 # $ 4 3 Q W 95 % KO 5 F6 A F7 × G ☐ Save For Later Sub 2025 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy C ►II A A F8 F9 F10 FL 6 7 88 & * 8 9 LLI E R T Y U A S D lock LL F G H 0 P J K L Z X C V B N M 9 H

Answer 1

Question

Chapter 5, Problem 5.22QE

Interpretation Introduction

Interpretation:

ΔH has to be determined for the reaction, H2(g)+ Cl2(g)→ 2 HCl(g).

Concept Introduction:

According to Hess’s Laws, change in enthalpy in an overall reaction can be calculated from the change in enthalpy of other reactions.

If an equation is obtained by the addition of more than one thermochemical equations, then the enthalpy change of that equation is the sum of change in enthalpy of all the equations added.

If an equation is the reverse direction of a thermochemical equation, then the change in enthalpy has same numerical value but opposite sign.

The enthalpy change depends on the mass of reacting substance. If the coefficients present in an equation is multiplied with a factor, then change in enthalpy also should be multiplied with that same factor.

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