How should the enthalpy of an intermediate step be manipulated when used to produce an overall chemical equation?

2 answers:

8 0

<span>The enthalpy of an intermediate step when used to produce an overall chemical equation should be manipulated in this way:
</span><span>Multiply the enthalpy by –1 if the chemical equation is reversed.
If the forward reaction requires energy, the reverse will produce energy.</span>

AVprozaik [17]3 years ago

8 0

Ans: Multiply the enthalpy by –1 if the chemical equation is reversed.

Enthalpy is a thermodynamic state function which represents the heat content of a system. For chemical reactions, enthalpy can be used to predict if the reaction is endothermic or exothermic.

If the enthalpy of the reactants is greater than products, the reaction is exothermic. If the reactants have a lower enthalpy than products, then the reaction is exothermic.

For a multistep reaction, the enthalpy of the intermediate step should be multiplied by -1 if the chemical reaction needs to be reversed in order to get the overall reaction.

You might be interested in

What is the balanced NET ionic equation for the reaction when aqueous Cs₃PO₄ and aqueous AgNO₃ are mixed in solution to form sol

rusak2 [61]

Answer:

$PO_4^{3-}(aq)+3Ag^+(aq)\rightarrow Ag_3PO_4(s)$

Explanation:

Hello!

In this case, since the net ionic equation of a chemical reaction shows up the ionic species that result from the simplification of the spectator ions, which are those at both reactants and products sides, we take into account that aqueous species ionize into ions whereas liquid, solid and gas species remain unionized. In such a way, for the reaction of cesium phosphate and silver nitrate we can write the complete molecular equation:

$Cs_3PO_4(aq)+3AgNO_3(aq)\rightarrow Ag_3PO_4(s)+3CsNO_3(aq)$

Whereas the three aqueous salts are ionized in order to write the following complete ionic equation:

$3Cs^+(aq)+PO_4^{3-}(aq)+3Ag^+(aq)+3NO_3^-(aq)\rightarrow Ag_3PO_4(s)+3Cs^+(aq)+3NO_3^-(aq)$

In such a way, since the cesium and nitrate ions are the spectator ions because of the aforementioned, the net ionic equation turns out:

$PO_4^{3-}(aq)+3Ag^+(aq)\rightarrow Ag_3PO_4(s)$

Best regards!

7 0

2 years ago

PLEASE HELP!!

NARA [144]

We can skip option B and D because NaCl is salt and H₂SO₄ is a strong acid.
Neutralization reactions are those reactions in which acid and base react to form salt and water.
As water being amphoteric in nature can react with HCl as follow,

HCl + H₂O ⇆ H₃O⁺ + OH⁻

In this case no salt is formed, so we can skip this option.

Ammonia being a weak base can abstract proton from HCl as follow,

HCl + NH₃ → NH₄Cl

Ammonium Chloride is a salt. So, among all four options, Option-C is the correct answer.

3 0

2 years ago

Read 2 more answers

If a substance changes color, what has most likely happened

BabaBlast [244]

say for example, the color of our blood inside the body is blue, when you have a cut, th he blood color is red through oxygenation.

5 0

2 years ago

Which of the following examples of erosion would occur most quickly?

anyanavicka [17]

Answer: OC

Explanation: