Enthalpy Question: H2 (g) + Cl2 (g) --> 2 HCl (g) + 184.62 kJ

[ThatDude]

Homework Statement

H_{2 (g)} + Cl_{2 (g)} --> 2 HCl _(g) + 184.62 kJ

Four statements about energy changes in reactions are listed below:

1. The enthalpy of the reactants is greater than the enthalpy of the products.
2. The enthalpy of the reactants is less than the enthalpy of the products.
3. The change in enthalpy of this reaction is positive.
4. The change in enthalpy of this reaction is negative.

Which two statements are true for this reaction?

2.The attempt at a solution

The delta H is -186.62 kJ; therefore the enthalpy of the products must be greater than the enthalpy of the reactants. I chose statement 2 & 4.

The answer key states that statements 1 & 4 are correct.

 

[Chestermiller]

Homework Statement

H_{2 (g)} + Cl_{2 (g)} --> 2 HCl _(g) + 184.62 kJ

Four statements about energy changes in reactions are listed below:

1. The enthalpy of the reactants is greater than the enthalpy of the products.
2. The enthalpy of the reactants is less than the enthalpy of the products.
3. The change in enthalpy of this reaction is positive.
4. The change in enthalpy of this reaction is negative.

Which two statements are true for this reaction?

2.The attempt at a solution

The delta H is -186.62 kJ; therefore the enthalpy of the products must be greater than the enthalpy of the reactants. I chose statement 2 & 4.

The answer key states that statements 1 & 4 are correct.

ΔH=H_products-H_reactants=-184.62 kJ

Chet