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Physical Chemistry
Kindly help in calculating molar ratios from chemical composition?
I have tried and thought alot, but failed in understanding.
I am glad if you can explain me all three ratios from the article.
SiO2/ Al2O3,
H2O/ Na2O
Na2O/ SiO2
Please email me your email address for detailed discussion.
Best regards
Hasnain
I have tried and thought alot, but failed in understanding.
I am glad if you can explain me all three ratios from the article.
SiO2/ Al2O3,
H2O/ Na2O
Na2O/ SiO2
Please email me your email address for detailed discussion.
Best regards
Hasnain
Physical Chemistry
The hydrolysis of a substrate is simultaneously catalyzed by H+ & OH- ions & also occurs spontaneously. The reaction is first order with respect to all species. Write down the expression for the rate constant. Hence show the rate is minimum when [H+] = [ {K(OH-) / K(H+)} * Kw ]^(1/2)
Physical Chemistry
Why Gibbs Free energy (G) rather than Entropy (S) is taken as a better function to ascertain the criteria of Equilibrium & Spontaneity ?
Physical Chemistry
Water is heated to boiling at a pressure of 1 atmosphere. When and electric current of 1 A from a 6 V supply is passed for a period of 300 seconds through a resistance in thermal contact with it, it is found that 0.798 g water is vaporized. Calculate the molar internal energy and enthalpy changes at the boiling point (373.15 K)
Physical Chemistry
The internal energy change when 1 mole of CaCO3 in the form of calcite converts to aragonite is +0.21kJ. Calculate the difference between the enthalpy change and the change in internal energy when that the pressure is 1.00 bar given that the densities of the solids are 2.71 g.cm-3 and 2.93 g.cm-3 respectively.
Physical Chemistry
THE MOLECULAR MASS OF CHLORIDE OF SULPHUR IS 103 AMU. WHAT IS THE EMPERICAL FORMULA OF THIS SUBSTANCE????? S=32 AND CL= 35.5
Physical Chemistry
Hi! I am doing an experiment where I measure the volume of hydrogen gas produced from reacting different concentrations of an acid with a magnesium strip.
I have calculated the rate of reaction fir each concentration and the units are dm3s-1
I now need to plot a graph of concentration of the acid against rate of reaction.
Do I need to convert the units from dm3s-1 to moldm-3s-1 in order to determine the order of the reaction with respect to the acid?
Thanks :)
I have calculated the rate of reaction fir each concentration and the units are dm3s-1
I now need to plot a graph of concentration of the acid against rate of reaction.
Do I need to convert the units from dm3s-1 to moldm-3s-1 in order to determine the order of the reaction with respect to the acid?
Thanks :)
Physical Chemistry
Can I make a soap using these?
Propylene Glycol +glycerin + what other ingredients needed?
Propylene Glycol +glycerin + what other ingredients needed?
Physical Chemistry
A quantity of wet steam of mass 0.15kg is trapped in a cylinder behind a leak-proof piston. The initial pressure and quality of the steam are 3 bar and 0.7 respectively. Heat is supplied to the steam at constant pressure until the volume becomes 0.1 cu.m. Calculate
a) The work done: answer 10.9 KJ
b ) the change in internal energy : answer 98.1KJ
c) heat transfer : answer 109 KJ
a) The work done: answer 10.9 KJ
b ) the change in internal energy : answer 98.1KJ
c) heat transfer : answer 109 KJ
Physical Chemistry
A fixed quantity of wet steam of mass 0.3kg undergoes a polytropic expansion according to the relation PV^n=c. The initial pressure is 4.5 bar and the final pressure of 2.5 bar. The initial quality is 0.8 . Calculate
a) the final qualtiy of the steam : answer 0.749
b) the work done by the steam : answer 20.75 KJ
a) the final qualtiy of the steam : answer 0.749
b) the work done by the steam : answer 20.75 KJ
