How many geometrical isomers are there of hex-2,4-diene, CH3CH=CHCH=CHCH3?
Describe what happens to the temperature when a change of state from liquid to gas is taking place. Explain.
What method(s) of analysis do we use to determine the purity of the substance?
The hydrolysis of 1-chloropropane to produce propan-1-ol is much slower corresponding to hydrolysis of 1-iodopropane. Explain this observation.
Describe the differences, in terms of the motion and arrangement between solid, liquid and gaseous particles.
The equilibrium constant for the reaction H2(g) + I2(g) <-> 2HI(g) is 60 at 723K. What is the number of moles of HI in equilibrium with 2 mol of H2 and 0.3 mol of I2 at 723K?
At room temperature iron will rust in moist air.
Describe and explain the variation in boiling point of the gases Hydrogen Fluoride, Hydrogen Chloride, Hydrogen Bromide and Hydrogen Iodide.
In general, how do we know which methods (Crystalisation or Evaporation to dryness) to obtain the pure crystal of a salt?
Water gas, a mixture of Carbon Monoxide and Hydrogen, is prepared by passing Steam over heated Carbon. Energy is absorbed during the process.
ii) Construct a balanced equation for this reaction.
iii) Calculate the Enthalpy Change of reaction given that
C≡O 1072 kJ/mol
H-H 432 kJ/mol
O-H 467 kJ/mol