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Posted: Wed Feb 07, 2018 1:21 pm
On the first quiz there was a question regarding heat exchange and release I had trouble understanding if you use endothermic/exothermic to answer these or just common knowledge such as the sun heats up water during evaporation therefore there is heat exchange.
Posted: Wed Feb 07, 2018 1:38 pm
Regarding the question about the sun, you would know that there is heat exchange because the sun is causing the water to evaporate - it's transferring Joules of energy into the water to the point where the water reaches Hvap.
As far as processes being exothermic or endothermic, for the sun the process would be exothermic - it's releasing heat - and for the water the process would be endothermic - it's taking up heat.
Posted: Wed Feb 07, 2018 5:35 pm
A process is exothermic when it releases heat and a process is endothermic when it absorbs heat.
Posted: Mon Mar 12, 2018 9:44 am
You would use common knowledge to understand if something is heating up or not. And using that, we can determine if something is endothermic (takes heat), or exothermic (loses heat) in regards to each term in a reaction.
Posted: Sat Mar 17, 2018 2:10 am
Exothermic processes give off heat while endothermic processes absorb heat. It is important to identify which you consider to be the system and which are the surroundings.