For steady flow through heat exchanger at approximately atmospheric pressure, what is the final temperature when heat in the amount of 800 kJ is added to 10 moles of ethylene initially at 200 °C?

The final temperature when heat in the amount of 800 kJ is added to 10 moles of ethylene initially at is .

Explanation:

It is known that the heat capacity of ethylene is 2.145 J/g K. Hence, for 10 moles of ethylene its mass will be as follows.

      No. of moles =

           10 mol =                  

           mass = 280.5 g

Now, we know that relation between heat energy, mass and specific heat is as follows.

          q =

         1329.63 = T - 473

              T = 1802.63 K

or,              =

                 =

Thus, we can conclude that the final temperature when heat in the amount of 800 kJ is added to 10 moles of ethylene initially at is .

m=9

step-by-step explanation:

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