Determine the phase or phases in a system consisting of H2O at the following conditions and sketch p– and T– diagrams showing the location of each state. (a) p 5 10 bar, T 5 179.98C. (b) p 5 10 bar, T 5 1508C. (c) T 5 1008C, p 5 0.5 bar. (d) T 5 208C, p 5 50 bar. (e) p 5 1 bar, T 5268C.

as given the equation is

2al + 6 hcl > 2 alcl3 + 3 h2(g)

as per equation two moles of aluminum reacts with six moles of hcl to give two moles of alcl3 and three moles of hydrogen gas

given: three moles of al are present and 7 moles of hcl

for three moles of aluminum nine moles of hcl will be required

however as 7 moles of hcl are present so the limiting reagent is hcl

hcl is going to decide the number of moles of product formed

when six moles of hcl are present = 3 moles of h2 are formed

when one mole of hcl is present == 3/6 mole sof h2 will be formed

when 7 moles of hcl are present = 3 x 7/ 6 moles of h2 will be formed = 3.5 moles of h2

the correct answer to this question is 2

the answer is a! (2.9 x 10^-18 j) hope i could someone. : )