Question

the heat of combustion of carbon to carbon dioxide is -3 93.5 kilo joule per mole the heat released upon formation of 35.2 gram of carbon dioxide from carbon and Oxygen gas is

Answer 1

Explanation:

we have the ratio of the element in the compound so we have the empirical formula which is

C5H5O

each empirical formula unit has a mass of (5x12+5+16)= 81g

the molecular mass is 162 g so there are 2 empirical units in the molecular formula

the molecular formula is

C10H10O2

Answer 2

Given, c(s)+o2(g)=co2(g)

deltafH= -393.5kjmol*-1

Therefore, heat released on formation of 44g or 1 mole co2 = -395kj mole

Therefore , heat released on formation of 35.29of co2

= -393.5kjmole* -1/44g ×35.2g

= -315kj