ahmedabudief

Dr. Ahmed Mohamed Abu-Dief

Professor - Professor of Physical and Inorganic Chemistry

Faculty of science

Address: Behind hospital of Sohag University - Ali Ebn Abi Taleb Street

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benzene
How many actual double bonds does the benzene ring possess? (a) None, carbon-carbon bonds in benzene are delocalized around the ring (b) 1 double bond (c) 2 double bonds (d) 3 double bonds (e) 4 double bonds Read more

alkane
A molecule with the formula C3H8 is a(n): (a) hexane (b) propane (c) decane (d) butane (e) ethane Read more

Free energy
Which of the following statements regarding the Gibbs free energy change for a reaction is false? * a) The Gibbs free energy change is the proportion of the enthalpy change of a reaction that is used to increase the entropy. * b) If the Gibbs free energy change for a reaction is negative, the reaction happens spontaneously. * c) The ... Read more

Go for the reaction
Calculate Go for the reaction given the following information: 2SO2(g) + O2(g) = 2SO3(g) ΔGfo for SO2(g) = -300.4 kJ/mol; ΔGfo for SO3(g) = -370.4 kJ/mol (a) -70.0 kJ (b) +70.0 kJ (c) -670.8 kJ (d) -140.0 kJ (e) +140.0 kJ Read more

State function
1- Which one of the following thermodynamic quantities is NOT a state function? (a) Gibbs free energy (b) Enthalpy (c) Entropy (d) Internal energy (e) Work Read more

Heat of solution
Write a brief account of how to determine heat of solution of unknown salt. Read more

Determination number of Hyrated molecules
Write abrief account on the expriment of how determine number of Hyrated molecules. Read more

Seperation of mixtures
Write a short notes on how to seperate the mixtures? Read more