Hlo sir, i have one que. Why in physics when work is done by the system we take it positive while when work is done on the system we take it negative plss clear my doubt sir plsss
The short answer is: "because we said so". We assign a sign convention to account for the direction of work from outside the system to the system, or vice versa. In Physics, it is common to use the heat engine sign convention for heat and work, such that work done by the system is positive, and work done on the system is negative, and vice-versa for heat. In chemistry, IUPAC sets a standard for both energy forms to be positive when entering the system, and negative when exiting the system.
Thanks for putting this together. It's very well organized and very clear. I agree, I'm surprised they aren't more popular. Keep up the good work!
Thanks Dan, I appreciate that! Will definitely keep them coming :)
You're the best teacher I've seen ever thank you so much
dude these videos are PERFECT. cant believe they arent more popular. btw where is your accent from
So much better than my lecture's lecture notes. Thank you very much
This video is absolutely perfect, and this is coming from your hardest critic ;)
Man , thank you so much. Great work keep going!!!
Great delivery! Keep it up!
Thanks for ur great lecture
he is talking like a coach giving motivational talk.
Hlo sir, i have one que. Why in physics when work is done by the system we take it positive while when work is done on the system we take it negative plss clear my doubt sir plsss
The short answer is: "because we said so".
We assign a sign convention to account for the direction of work from outside the system to the system, or vice versa. In Physics, it is common to use the heat engine sign convention for heat and work, such that work done by the system is positive, and work done on the system is negative, and vice-versa for heat. In chemistry, IUPAC sets a standard for both energy forms to be positive when entering the system, and negative when exiting the system.
Clarify on the indication of negative and positive sign
Hey, the audio and video are misaligned, is this happening for anyone else?
you are way better than our autistic professors. good job man.