Other Chemistry Answers

Why is hydrogen gas not an ideal fuel?

calculate w, and determine whether work is done by or on the system when 435 J of heat is absorbed and DeltaU=710 J.

a 55 g sample of water at 80 degrees celcius is added to a sample of water at 25.5 degrees celcius in a constant pressure calorimeter. If the final temperature of the combined water is 39.4 degrees celcius calculate the mass of water originally in the calorimeter.

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CH4 (g) + 2O2(g) <-> CO2(g) + 2H2O(g) + 211 kcal
Indicate the direction that the reversible reaction will proceed to re-establish equilibrium if the following "disturbances" occur. The possible answers are:
(a) forward direction ->
(b) reverse direction <-
(c) no change

What is observed when magnesium ribbon is added to dilute sulphuric acid?

balance the equation
68 kcal + O2(g) <-> O3(g) + 31 kcal

Calculate the e.m.f. of a copper-zinc voltaic cell working with the following electrolytes 0.001 M CuSO4 and 0.001 M ZnSO4.?

Calculate activation energy, a constant A of the Arrenius equation , Vant-Goff's coefficient and reaction constant at T3. Use formula of Vant-Hoff's law.

CO+H2O=CO2+H2,
k2, min^-1 mole^-1= 8.15*10^-3,
T2,K= 310,
k1, min^-1 mole^-1= 3.1*10^-4,
T1,K= 290,
T3,K= 300

In which case is iron corroded faster, if a protective coating is partly damaged:
a) tin- or zinc-plated iron?
b) chromium- or nickel-plated iron?
Explain your answer by writing down the equations of the cathodic and anodic reactions in acid, neutral and alkaline medium.

Calculate the e.m.f. of a copper-zinc voltaic cell working with the following electrolytes 0.001 M CuSO4 and M ZnSO4.?