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OMG CHEMISTRY UNIT 1 PAPER!!!!!!!!!!!!

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err no, the question asked for temperature change and not enthalpy change and temperature change doesn't change if you increase the volume as long as its the same concentration
 
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oh and omg what did you guys write for how to show that excesss was addedddd ?
I wrote since 1 mole of the Al compound was reacted with 2 moles of acid to form 1 mole of the product..since there is and extra mole of acid left to use, we can show that the acid was added in excess..it makes sense..dunno if its correct though. :p
 
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You do make sense but I think the question asked on the practical procedure and not calculation method , I hope you know what I mean
 
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You had to write that
increases cuz there is more shielding and more repulsion. Also the force of attraction from the nucleus is less so more energy is needed to add the electron. Thats what i think as i did not know we had affinity x.x
less energy is released since electron affinity is an exothermic process
 
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You do make sense but I think the question asked on the practical procedure and not calculation method , I hope you know what I mean
Yeah i get it..If thats the case i am so screwed..lol..but how can u practically show it? i mean u can show that the solution is still acidic by using a pH meter. lol i don;t know any other way. :p
 
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I know I hated that question so so much , I wrote some stupid crap that made no sense at all -.- what did you write for the importance of cracking process in the industries ?
 
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I know I hated that question so so much , I wrote some stupid crap that made no sense at all -.- what did you write for the importance of cracking process in the industries ?
Smaller hydrocarbons are more useful, and smaller hydrocarbons are easier to make products with...i know..the 2nd one doesnt make sense..lol.. :p
 
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Hahaha yeah I wrote that too that smaller fractions are more useful than heavier ones . I read in the text book right now that alkenes are obtained from the cracking of alkanes so that could have been one of the answers but I didnt write in the exam :p The second point I wrote was to obtain hydrogen :p
 
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okay so since that one is figured what else was there ? I actually liked the MCQ oh was phophorus a giant atomic structure or a small molecular ?
 
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