The very first calculation for delta h1 at minute 5:20. I can't get the same result, I get -3.36 kJ/mol. You're supposed to integrate so you then solve a*(-44) + b/2*(-44^2) + c/3*(-44^3) ???
You have not integrated properly. Instead of using -44 retry with [a*56+(b/2)(56^2)+...] -[a*100+(b/2)(100^2)+...] and you should get the same answer as above.
Praveen Praveen you can get these data from the book elementary principles of chemical processes by felder and Rousseau or from Perry’s chemical engineering handbook
So if you have an exothermic reaction, which is a negative energy flow. to cool it down you have to put in the opposite energy (positive) But for somereason condensors are negative energy flow.
The changes in enthalpy are negative, which in turn makes Q negative. That makes sense because it is a cooling operation. Does that answer your question?
@@LearnChemE I think we can calculate by mCp∆T, by taking the average of inlet and outlet temperatures. And at that average temperature we would find CP to incorporate into mCp∆T equation.
For 4:44 shouldn't the equation for specific heat be Cp=a+bT+cT^2+dT^3, not Cp=a+bT+cT+dT^3?
Kat Cruz you are correct
Yes, thank you. We will make this change soon.
@@LearnChemE This is the Form 1
The very first calculation for delta h1 at minute 5:20. I can't get the same result, I get -3.36 kJ/mol. You're supposed to integrate so you then solve a*(-44) + b/2*(-44^2) + c/3*(-44^3) ???
You have not integrated properly. Instead of using -44 retry with [a*56+(b/2)(56^2)+...] -[a*100+(b/2)(100^2)+...] and you should get the same answer as above.
Not -44^2. It is 56^2 - 100^2
Would LaPlace transformation be in order to solve this problem, too?
How should energy balance be done when you don't the outlet stream temperatures nor heat duty enthalpy change in the process?
May I know what was the table was ?...that is used here for reference of cp
Praveen Praveen you can get these data from the book elementary principles of chemical processes by felder and Rousseau or from Perry’s chemical engineering handbook
How this method is difference from lmtd method?
If cooling is in vaccum medium ...than how to calculate cooling duty
Is it the same calculation used in process design simulation
So if you have an exothermic reaction, which is a negative energy flow. to cool it down you have to put in the opposite energy (positive) But for somereason condensors are negative energy flow.
Can you make a video on energy balances ?
Here's a playlist for energy balances: ruclips.net/p/PL4xAk5aclnUiDazeSqz59Zb9NC1a2AK0q
For the calculation of Cp, do we use the temperatur in degree or in Kelvin ?
Celsius
Can you please make a video on condensation of Binary mixture of vapor (Say Ethanol+water vapors) in a condensor. Many thanks in advance.
Isn't (n dot)(sum of enthalpy) = to negative Q? You have to subtract Q to the other side of the energy balance?
The changes in enthalpy are negative, which in turn makes Q negative. That makes sense because it is a cooling operation. Does that answer your question?
Sir
It is a+ bT+cT2 + dT3
This answer is true false ? Please help
Actone boiling point 54 to 56 degree celius
Please how can I get the reference 😢😢
reference point is constant and will be available on a given table
Any chemical engineer here in comments section plz reply me back
yerrrr
Why we not use mCp∆T ??
Great question. It's because in this case Cp is dependent on temperature, so it is not constant over the temperature range.
@@LearnChemE Hi ! How can we know if it will be constant or not ?
@@LearnChemE I think we can calculate by mCp∆T, by taking the average of inlet and outlet temperatures. And at that average temperature we would find CP to incorporate into mCp∆T equation.
Thank you!
Very helpful
hi ,any one ,any one can send me lectures of basic principle of chemical engineering thanx very much
anmar samir hi I want energy balance for making of bread
It is kJ/s not kJ/sec sit down and study proper writing