A sample of coal contains C = 92%; H = 7% and ash = 1%. The following data were obtained when the above coal was tested in a %3D %3D bomb calorimeter. Weight of coal burnt =0.92 g Weight of water taken = 550 g Water equivalent Initial temperature Final temperature Fuse wire correction Acid correction 3D2200g = 27.2 °C = 29.5 °C =10.0 cal = 50.0 cal || %D Calculate the gross and net calorific value of the coal, assuming the latent heat of condensation of steam as 580 cal/g.

Calculate Npr = ______x10^3 Please show your complete solution. When solving write the units. Please write clearly and readable. Thank you.

A substance (A) reacts to form another substance (B) according to: 3B(g) = 2A(g) The reaction is run at a particular temperature with the concentrations of A and B monitored over time and plotted on the graph below. At what time was equilibrium fırst reached and what is the approximate value of the equilibrium constant? 2.0 1.8 E 1.6 1.4 [B] 1.2 1.0 0.8 0.6 0.4 [A] 0.2 0.0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 time / min O Equilibrium was reached at 70 min with K. = 0.0056. O Equilibrium was reached at 30 min with K. = 0.0056. Equilibrium was reached at 30 min with K. = 0.023. Equilibrium was reached at 70 min with K. = 0.023. concentration / M

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