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Limutus
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Has anyone done the chemistry evaluative practical "enthalpy change of combustion" I am doing it soon and I'm very stressed I need help what questions come up?
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Chellecharity
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Can't tell you exactly what but it's a moderately easy paper.
Revise equations of combustion and balancing them.
Also revise the step by step process of finding out enthalpy change. E.g calcifying energy (e= temp. Change x sph x mass) *change it into KJ* ,
calculating number of moles of fuel used (n=mr) , then dividing the energy by no. Of moles to find KjMol-1
revise the 3 things that affect enthalpy change (standard state conditions)
i got 12/15 and lost marks on stupid idiotic errors such as forgetting to put a minus on ny figure for the enthalpy change of combustion
READ THE PAPER VERY CAREFULLY AND DO EXACTLY WHAT IS SAYS (don't just assume)
other than that, you'll be fine
Revise equations of combustion and balancing them.
Also revise the step by step process of finding out enthalpy change. E.g calcifying energy (e= temp. Change x sph x mass) *change it into KJ* ,
calculating number of moles of fuel used (n=mr) , then dividing the energy by no. Of moles to find KjMol-1
revise the 3 things that affect enthalpy change (standard state conditions)
i got 12/15 and lost marks on stupid idiotic errors such as forgetting to put a minus on ny figure for the enthalpy change of combustion
READ THE PAPER VERY CAREFULLY AND DO EXACTLY WHAT IS SAYS (don't just assume)
other than that, you'll be fine
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Limutus
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