![christinaS7696](/avatars/3439.jpg)
christinaS7696
27.07.2020 •
Chemistry
The final overall chemical equation is Upper Ca upper O (s) plus upper C upper O subscript 2 (g) right arrow upper C a upper C upper O subscript 3 (s).. When the enthalpy of this overall chemical equation is calculated, the enthalpy of the second intermediate equation is halved and has its sign changed. is halved. has its sign changed. is unchanged.
Solved
Show answers
More tips
- L Leisure and Entertainment Unlocking the Secrets of Fast and Effective Tectonic Learning...
- S Style and Beauty How to Choose the Perfect Hair Color?...
- C Computers and Internet Best iPad Games: Our Opinion...
- A Animals and plants Man s Best Friend: Which Dog Breed Is the Most Friendly?...
- H Health and Medicine 10 Simple Techniques on How to Boost Your Mood...
- G Goods and services How to Choose the Right High Chair for Your Baby?...
- S Style and Beauty Learn how to tie a keffiyeh on your head like a pro...
- S Style and Beauty How to braid friendship bracelets?...
Answers on questions: Chemistry
- B Business Which of the following statements is correct? a. most sinking funds require the issuer to provide funds to a trustee, who saves the money so that it will be available...
- H History Why did james ii create the dominion of new england?...
- H History What did the flying tigers and the navajo code talkers have in common...
- M Mathematics -6(12p-8n) Please help me with this distributive property question....
- M Mathematics Write a polynomial in factored form, given the following solutions: X=2, X= -2...
Ответ:
the enthalpy of the second intermediate equation is halved and has its sign changed.
Explanation:
Let us take a look at the first and second intermediate reactions as well as the overall reaction equation for the process under review;
First reaction;
Ca (s) + CO₂ (g) + ½O₂ (g) → CaCO₃ (s) ΔH₁ = -812.8 kJ
Second reaction;
2Ca (s) + O₂ (g) → 2CaO (s) ΔH₂ = -1269 kJ
Hence the overall equation is now;
CaO (s) + CO₂ (g) → CaCO₃ (s) ΔH = ?
According to the Hess law of constant heat summation, the enthalpy of the overall reaction is supposed to be obtained as a sum of the enthalpy of both reactions but this will not give the enthalpy of the overall reaction in this case. The enthalpy of the overall reaction is rather obtained by halving the enthalpy of the second intermediate reaction and reversing its sign before taking the sum as shown below;
Enthalpy of Intermediate reaction 1 + ½(- Enthalpy of Intermediate reaction 2) = Enthalpy of Overall reaction
Ответ:
Just took it and this was the explanation
Both use couplets for their rhyme scheme and structure. Both use figurative language to express hope that the subject will be rewarded in heaven for good deeds. Bradstreet’s topic is love and marriage, while Wheatley’s topic is King George III. Bradstreet uses more nature imagery than Wheatley, which connects to the poem’s topic.
Explanation: