What is the (Delta Hrxn) for the reaction

 a) -200.5 kJ
 b) -2219 kJ
 c) -3182.5 kJ
 d) -2389.5 kJ
 e) -2267.7 kJ 

 Based on the (Delta Hrxn) for the reaction, we can argue that:
 a) The reaction is exothermic
 b) The reaction is endothermic
 c) The system released a lot of energy and the surroundings did not absorb it
 d) The surroundings gave a little energy to the system for the reaction to occur
 e) None of the above

 Hess's Law is interesting because it allows you to determine the (Delta Hxrn) for a reaction using the (Delta H) of others. This is possible because:
 a) The (Delta Hxrn) is only dependent on the initial and final states.
 b) The (Delta Hxrn) is a function of the step. So I can use the others (Delta H) of the other reactions
 c) (Delta Hxrn) is a function of the state.
 d) Statements a and c are correct.
 e) Statements a and b are correct 

In the exercise you just did, to use Equation 3 in determining the (Delta Hxrn), I have to:
 a) Leave it the same and multiply the (Delta H) they give me by 2
 b) Invert it and multiply the (Delta H) they give me by 2
 c) Invest it and also change the sign of the (Delta H) that they give me
 d) I don't have to do anything.
 e) I just have to change the sign of the (Delta H) they give me.

Answer rating: 100% (QA)

1 b The Delta Hrxn ... View the full answer