Rate of reactions vs. HEat energy evolves per second inititally

AI Thread Summary
The reaction between nitrogen dioxide and carbon monoxide produces nitric oxide and carbon dioxide, with a rate law of k[NO2]^2, where the rate constant is 0.515 L/(mol*s). To calculate the heat energy evolving per second from a 3.50 L mixture containing 0.0250 M NO2, first determine the number of moles of NO2 present, which is 0.0875 moles. Using the enthalpy change of 33.1 kJ/mol, the heat energy can be calculated based on the moles reacting per second. If 1 mole of NO2 is produced per second, the energy released would be 33.1 kJ, and for 0.5 moles, it would be 16.55 kJ. The relationship between concentration, volume, and rate constant is crucial for determining the rate of reaction and subsequent heat energy release.
yannguyen
Messages
4
Reaction score
0
Nitrogen dioxide reacts with carbon monoxide by the overall equation:

NO2(g) + CO(g) ----> NO(g)+ CO2(g)

At a particular temperature, the reaction is second order In NO2 and zero order in CO. The rate constant is 0.515 L/(mol*s). How much heat energy evolves per second initially from 3.50 L of reaction mixture containing .0250 M NO2?

Assume the enthalpy change is constant with temperature.How much heat energy evolves per second initially from 3.50 L of reaction mixture containing .0250 M NO2?

I figured out the rate law for this = k[NO2]^2
The enthalpy change for NO2 is 33.1 kJ/mol
However I don't really understand how the concentration, the volume, and the rate constant would relate to find out the heat energy?

Should i find the number of moles of NO2 or what should I do? I totally have no idea about this!

Any help would be highly appreciate
 
Chemistry news on Phys.org
How much energy would evolve during a second if there were 1 mole of NO2 produced per second? And if there were 0.5 mole produced? And if there were n moles produced?
 
It seems like a simple enough question: what is the solubility of epsom salt in water at 20°C? A graph or table showing how it varies with temperature would be a bonus. But upon searching the internet I have been unable to determine this with confidence. Wikipedia gives the value of 113g/100ml. But other sources disagree and I can't find a definitive source for the information. I even asked chatgpt but it couldn't be sure either. I thought, naively, that this would be easy to look up without...
I was introduced to the Octet Rule recently and make me wonder, why does 8 valence electrons or a full p orbital always make an element inert? What is so special with a full p orbital? Like take Calcium for an example, its outer orbital is filled but its only the s orbital thats filled so its still reactive not so much as the Alkaline metals but still pretty reactive. Can someone explain it to me? Thanks!!
Back
Top