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Chemistry
A Level

Predict the effect of an increase in pressure and temperature on the production of ammonia in the reaction: N2(g) + 3H2(g) <-> 2NH3 (g) , where the change in enthalpy is -92.4 kJ

An increase in temperature and an increase in pressure will have contradictory effects on the reaction.

The effect of an increase in the temperature of a system, on the equilibrium of a r...

AS
Answered by Aaron S. Chemistry tutor
39733 Views

How can I improve my exam technique?

The best way to improve your exam technique is to do past papers under timed conditions. Be strict with yourself and treat it like an actual exam. Then mark your own paper using the official mark schem...

SL
Answered by Samah L. Chemistry tutor
4625 Views

What is the significance of a reactant being zero, first, or second order when calculating the rate of a reaction?

In simple terms, we need to know whether a reactant is first, second or zero order if we want to understand what effect changing the concentration of that reactant has on the rate of the reaction.

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NB
Answered by Naomi B. Chemistry tutor
11179 Views

What is nucleophilic substitution and how can I draw a mechanism to show this reaction taking place?

  1. A substitution reaction is a displacement reaction. This is when one functional group in one reactant is displaced by another functional group from a second reactant.This is different to an addition...
AB
Answered by Amber B. Chemistry tutor
6934 Views

State and explain the trend in atomic radius down a group of the periodic table

Down a group of the periodic table, the atomic radius increases.
As we go down a group, the outermost electron of an atom is placed in a shell that is further from the nucleus. This means it experien...

TC
Answered by Thomas C. Chemistry tutor
32878 Views

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