A calorimeter has a heat capacity of 320 cal K -1 and contains 718 g of water. Initially the apparatus is at 22.0 o C and contains 1.50 g of ethyl
alcohol, C 2 H 5 OH, in oxygen. If the heat of combustion of ethyl alcohol is
-328 kcal mole -1 , what will be the temperature of the calorimeter when
combustion is complete?

d: the voltage of the secondary coil is less than that of the primary coil.

im not suree sorry if wrong

wher is the rest of the question

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