Enthalpy Stoichiometry Part 1: Finding Heat and Mass
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- เผยแพร่เมื่อ 5 พ.ย. 2018
- We'll go over the main conversion factors you need for enthalpy stoichiometry, after this, you will find thermochemical equations a lot simpler! Plus I'll go over major keywords like heat absorbed or heat released and how they affect our enthalpy change.
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Hi question, just wondering how you figured out where to but the mols when dividing everything. I understand everything else, it just that bit is stumping me. Thank you so much :D
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What about when you are not given an enthalpy and are only given the temperature change and the mass of water?
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what about when theres an excess?? For example my question is "Calculate how much energy is changed when 16 g of O2(g) reacts with excess ClF3(g)". How do I work in the excess amount? plz answer
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Hi, why didn't you change the -1204kj into positive when it was above the 2 moles. I only ask this because I've seen other chemistry videos and they reverse the sign in the stoichiometry process
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is the answer for the last example letter b, 1340.35 kJ?
When multiplying to get both the magnesium and the oxygen to balance out, wouldn't the oxygen change to 4 when you times it by 2?
Hey Shuat, so we never multiply the subscripts and the coefficient for balancing. The magnesium is the only one that has that 2 in front. I recommend reviewing some more balancing equations, I recommend these videos:
Video 1: th-cam.com/video/jy6F0Lbvjm8/w-d-xo.html
Video 2: th-cam.com/video/P0BSTjziVys/w-d-xo.html
How many kilojoules are given off when 17.8 mol of CH4(g) react?
CH4(g) + 2O2(g) → CO2(g) + 2H2O(ℓ) ΔH = −890.1 kJ please this solve because I don't understand help me
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Thanks for the help! this video actually helped with some of the problems. However, I still can't figure out which conversion factor to use if the given information is volume of methane gas at a certain preassure in Torr and a certain temperature in degrees celcius.
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