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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specific heat capacity
HOW MUCH HEAT IS REQUIRED TO RAISE THE TEMPERATURE OF 10 GRAM OF PIECE OF (AL) FROM 25 OC TO 35 OC (SPECIFIC HEAT CAPACITY OF ALUMINUM = 0.214 CAL/G) 214 14.2 4.12 21.4 Read more

heat evolved
HOW MUCH HEAT IS EVOLVED WHEN 256 G OF 2SO2 (MOLAR MASS = 64 G/MOL) IS BURNED ACCORDING TO THE CHEMICAL EQUATION SHOWN BELOW?HOW MUCH HEAT IS EVOLVED WHEN 256 G OF 2SO2 (MOLAR MASS = 64 G/MOL) IS BURNED ACCORDING TO THE CHEMICAL EQUATION SHOWN BELOW?HOW MUCH HEAT IS EVOLVED WHEN 256 G OF 2SO2 (MOLAR MASS = 64 ... Read more

galvanic cell
A galvanic cell consists of a Cd(_s_)|Cd2+(_aq_) half-cell and a Zn(_s_)|Zn2+(_aq_) half-cell connected by a salt bridge. Reduction occurs in the cadmium half-cell. The cell can be represented in standard notation as Cd(_s_)|Cd2+(_aq_) || Zn(_s_)|Zn2+(_aq_ Zn(_s_)|Zn2+(_aq_) || Cd(_s_)|Cd2+(_aq_ (Zn(_s_)|Zn2+(_aq_) || Cd2+(_aq_)|Cd (s Cd2+(_aq_)|Cd(_s_) || Zn(_s_)|Zn2+(_aq_ Read more

formation of products
When reaction favors formation of products Eocell is positive Eocell = 0 Eocell is negative None of the answers Read more

Cell potential
Using these metal ion/metal standard reduction potentials Zn2+(aq)|Zn(s) , Eo = -0.76 Ni2+(aq)|Ni(s) , Eo = -0.25 Calculate the standard cell potential for the cell whose reaction is (Ni2+(aq) + Zn(s) ↔ Zn2+(aq)+ Ni(s 0.51+ 1.01- 1.01+ 0.51- Read more

System
THE SYSTEM WHICH DOES NOT ALLOW THE EXCHANGE OF HEAT AND MASS Isolated system Open system Closed system Inert system Read more

فصل الكاتيونات
Give a brief account on identification of cations. Read more

فصل الانيونات
HOW TO IDENTIFY ANIONS? Read more

Redox
Which of the following statements is FALSE? (a) Oxidation and reduction half-reactions occur at electrodes in electrochemical cells. (b) All electrochemical reactions involve the transfer of electrons. (c) Reduction occurs at the cathode. (d) Oxidation occurs at the anode. (e) All voltaic (galvanic) cells involve the use of electricity to initiate nonspontaneous chemicalreactions. Read more

electrolytic cell
In an electrolytic cell the electrode at which the electrons enter the solution is called the ______ ; thechemical change that occurs at this electrode is called _______. (a) anode, oxidation (b) anode, reduction (c) cathode, oxidation (d) cathode, reduction (e) cannot tell unless we know the species being oxidized and reduced. Read more