Which of the following statements concerning the reaction shown below are true?

AgBr (s) + ½ Cl2 (g) → AgCl (s) + ½ Br2 (l) ∆H = -27.6 kJ

I. heat is absorbed
II. heat is released
III. rxn is exothermic
IV. rxn is endothermic
V. products have higher enthalpy content than reactants
VI. reactants have higher enthalpy content than products
Answer

I, III, and V

II, III, and V

II, III, and VI

I and III

Question

Which of the following statements concerning the reaction shown below are true?

AgBr (s) + ½ Cl2 (g) → AgCl (s) + ½ Br2 (l)      ∆H = -27.6 kJ

I. heat is absorbed
II. heat is released
III. rxn is exothermic
IV. rxn is endothermic
V. products have higher enthalpy content than reactants
VI. reactants have higher enthalpy content than products
Answer
		
I, III, and V
		
II, III, and V
		
II, III, and VI
		
I and III

ipwnbunnies · Answer

A negative net enthalpy means the the system lost energy to the surroundings during the reaction.

joannablackwelder · Answer

Using the information given, do you think that the reaction absorbed or released heat?

joannablackwelder · Answer

@gstprc ?

joannablackwelder · Answer

Hint: heat is a form of energy.

anonymous · Answer

released

joannablackwelder · Answer

:D

joannablackwelder · Answer

Perfect! So, when a reaction releases heat, is that endothermic or exothermic?

anonymous · Answer

exothermic correct?

joannablackwelder · Answer

Correct!

joannablackwelder · Answer

Enthalpy is internal energy.

anonymous · Answer

so far heat is released, and its exothermic

joannablackwelder · Answer

So, would the products or reactants have more energy?

joannablackwelder · Answer

Correct.

anonymous · Answer

that would make the reactants have more energy? since they are what cause the reaction?

joannablackwelder · Answer

You are right that reactants have more energy, but it is because 
Reactants -> products + heat

joannablackwelder · Answer

The reactants supply the energy for both the energy of the products and the heat.

anonymous · Answer

so let me ask this dumb question but could you tell me a quick definition of reactants and products

joannablackwelder · Answer

No problem.  :) Reactants are the compounds before the reaction takes place.

anonymous · Answer

and the products are the end result?

joannablackwelder · Answer

In this case, AgBr and Cl2.

joannablackwelder · Answer

Correct. The products are the compounds  after the reaction happens.

anonymous · Answer

thanks very much, would you like to go round two so i can get this practice? haha

joannablackwelder · Answer

And it's not a dumb question. :) People get them confused all the time!

joannablackwelder · Answer

Making more sense now?

anonymous · Answer

yes a little, could we do another?

joannablackwelder · Answer

Sure.

joannablackwelder · Answer

I hope my wireless will hold out. It has been a little sketchy lately, so if you lose me for a bit that is probably why.