5.1 Standard enthalpy changes of formation and combustion

Please note that the standard conditions are now 298 K and 100.0 kPa.
This video covers standard enthalpy changes of formation and combustion.

[bellaib]

For God sake! This is how easy it is? and from past two hours I'm trying to do it by watching videos and instead of solving questions directly, they'll go like go watch our previous video for this, for hess law, for that! Blah blah blah, made me feel like don't know how many damn lectures I have missed!
Thank you finally a video which actually helps!

[fuzivo]

I spent 2 hours on this. I have huge respect for you, sir.

[hannahwilson]

Thank you. You explained it much better than my teacher and textbooks!

[UltraTheBeastt]

my god my teacher took an hour to explain and it looked difficult but i swear only 2 mins into the video and i cracked it thanks man

[hadeerehab]

your videos are amazing THANK YOUU SOO MUCH 
its really helpful and it helped me a lot in my exam

[Fredrick..]

Straight to the point though...thanks, appreciated. ❤

[sabahnaurin]

Thank you! I never knew this was so simple.

[antoniahudge]

I have a question. On the equation for standard formation you said its (products - reactants) but when you were solving it you started with the reactants and then the products. I don’t understand why you started with the reactants and then the products

[lucasfly]

Thank you for helping me win an argument in my chemistry class

[idioticshits]

Excuse me sir..u said that the standard enthalpy change of combustion is the change when a substance burns completely in oxygen ..but then u shower it reacts with hydrogen?

[karthiksesham]

doesn't combustion produce water vapour? so wouldn't you need the enthalpy of formation of water vapour, not liquid water? I am asking because I want to convert enthalpy of formation to combustion using the combustion equation.

[gracelii]

I have a question, where did that numbers came from ? That makes me stop answering my modules because I can't understand where that numbers came from.

[nitikadesai]

thank you for making such amazing videos

[jesuloluwami]

How can enthalpy change be measured at a constant temperature (298K) when enthalpy changes often involve a rise or drop in temperature?

[god]

are standard conditions different in the current syllabus since here u are using 101.3kPa and 298K and in the newer vids its just 100kPa?

[JOKER-flbz]

I'm confused, where did you get the value of propane? My head is shaking

[nick.saneian]

At 3:42 shouldn't the hydrogen have a value of 0 because it is a free element? Or is that just for the standard enthalpy of formation?

[HK-sgld]

Thank you for making it easy to understand

[elizabethjitkaolsanska]

Hello, excuse me, just the video says that the values for enthalpy of combustion can be found in table 12, but I thought they are found in table 13 of the data booklet. Is it a typo, or am I wrong? Thank You, just want to make sure I use the correct ones :)

[terencetrouve]

I don't understand where come from the values (-394) for CO2 and (-286) for H2O.