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Explain how the Kekulé model of benzene is contradicted by the hydrogenation enthalpies of ethene and benzene

The Kekulé model of benzene consists of a 6 membered ring with 3 double bonds. This would imply a hydrogenation enthalpy very similar to that of ethene, since double bonds react with hydrogen in a similar st...
LM
Answered by Lukas M. • Chemistry tutor
2541 Views

I don't fully understand the purpose of integration. Could you please explain it to me?

I have written "… " where I would imagine the student is replying. I have then provided prompts assuming that the student did not come up with the answer straight away. Integration can be useful in...
RL
Answered by Rebecca L. • Maths tutor
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An ideal gas within a closed system undergoes an isothermal expansion from an initial volume of 1m^3 to 2m^3. Given that the initial pressure of the gas is 10^5 Pa, find the final pressure of the gas following the expansion.

The key word to note in this question is that the expansion is isothermal and that we have a closed system . This means that the expansion must happen at a constant temperature (isothermal), and that the num...
JL
Answered by James L. • Physics tutor
3458 Views

Explain the inertness of noble gases

The noble gases (group 0) are incredibly inert. Indeed if we are performing reactions that are sensitive to air we will often perform them under an atmosphere of Argon, the third noble gas. But why?We must l...
JW
Answered by James W. • Chemistry tutor
9102 Views

Write down the value of 27^(-2/3)

We are trying to solve 27 -2/3 . Firstly, using the index rule a xy = (a x ) y , this can be rewritten as (27 1/3 ) -2 . Lets tackle the value inside the bracket first: 27 1/3 means the cube root of 27, and ...
ML
Answered by Matt L. • Maths tutor
6925 Views