[Cally]

1.  The equation for the fermentation of glucose is :

C₆H₁₂O₆ -> 2C₂H₂OH + 2CO₂

If 37.2kJ of energy is evolved when 100g of glucose is fermented, what is the molar enthalpy of fermentation?

2.
3MgO + 2Fe ->Fe₂O₃ +3Mg

H _rxn = 980.9kJ
How much energy is transferred when 47.8kJ of magnesium metal is produced?

3.
A red-hot piece of lead is dropped into water.
Whic of the following statements are true?
(Assume that there are no energy transfer between anything except lead and water)

A.  :delta:T _lead is negative
B. q _lead = q _water
C. q _water is positive
D. T _final=  :delta:T _water - :delta:T _lead

Can B be accepted?
If it isn't, why is that?

* It would be helpful if somebody can list of all the steps thoroughly XD
Thanks XD

[MrTeo]

Enthalpies are directly proportional to moles, so you simply need to find out the number of moles involved and relate it to your ∆H values (anyway you should actually show your attempts before asking a question).