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research case studies in order to consider the formation of different
isomers during manufacture, how their presence may influence the
industrial process, the differences in properties that they might
have, and the possible consequences of ignoring the presence of
Enthalpy and internal energy of a system are always identical
enthalpy is a state function
$\Delta H$ is the enthalpy change at constant pressure
Reactions which absorb heat have a positive DH
Research the drugs thalidomide and ibuprofen, and their
therapeutic effects. Both drugs have optical isomers:
compare the structures and properties of the optical
isomers in each case study.
b) Explain why one of these drugs is only available as a
single optical isomer whilst the other is sold as a racemic
mixture (a 50:50 mixture of both optical isomers).
2 H2 (g) + O2 (g) → 2 H2O (l) ΔH = -571.6 kJ mol-1
If hydrogen and oxygen were mixed and allowed to react under constant pressure conditions, which of the following statements must be true?
Select as many answers as applicable however points will be deducted for incorrect guesses.
Select one or more:
ΔH = ΔU
ΔH = q
The temperature of the surroundings would increase
The temperature of the surroundings would decrease
This is an endothermic reaction
X + 2 H2O → X(OH)2 + H2
In this process, the water temperature rose from 25.0 °C to 37.1 °C. If 0.00579 mol of "X" was consumed during the reaction, and the ΔH of this reaction with respect to the system is -1278 kJ mol-1 , what volume of water (in mL) was present in the calorimeter?
The specific heat of water is 4.184 J g-1 °C-1
Consider the reaction of zinc oxide with carbon:
ZnO + C → Zn + CO ; ΔH = 240 kJ/mol of rxn
How much heat needs to be absorbed by the system (in kJ) to react 3121 g of ZnO with 351 g of C until the reaction is completed?