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Calculate Gibbs free energy when S = 131 J mol-1 and H = 155 kJ mol-1 at 25 C, stating whether or not the reaction is feasable.

First, make sure everything is in the correct units: H = 155 kJ mol-1 = 155000 J mol-1 S = 131 J mol-1 T = 25 C = 298K Then use the Gibbs equation to calculate the free energy: G = H - TS G = 155000-298*1...

IH
Answered by Isaac H. Chemistry tutor
2055 Views

How do I rearrange this equation for x? y=(x+2)/(3x-1) +2

First of all we must consider the fraction. To eliminate this we multiply both sides through by 3x-1. We then end up with y(3x-1)=(x+2)+2(3x-1). The next step is to expand out the brackets and collate ter...

CM
Answered by Charlie M. Maths tutor
4094 Views

Show (4+5/7) - (2+1/3) as a single mixed fraction.

Mixed number -> top heavy fraction: 4 + 5/7 = ((47)+5)/7 = (28+5)/7 = 33/7 2+ 1/3 = ((23)+1)/3 = (6+1)/3 = 7/3 Common denominator by multiplying by each others: 33/7 = (333)/(73) = 99...

ER
Answered by Ethan R. Maths tutor
3311 Views

Do I need to evaluate the context of a source?

When answering a question that involves a source and asks how far it goes in supporting one historical viewpoint, the easiest thing to do is use the 'COP' system. First look at the context, what was happe...

AR
Answered by Alicia R. History tutor
6256 Views

I dont really know what the LNAT is, how can I prep for it?

The most useful tool when preparing for an LNAT is practice papers and the LNAT website itself. The more practice essays you write and get feedback on the better your essay form will become. Often the act...

OC
Answered by Olivia C. LNAT tutor
1887 Views

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