Question

what is the heat value of styrene (c8h8) in btu/lb a) 18024 b) 18074 c) 18134 d) 18184

Answer 1

Btu is british thermal unit is a unit of energy whereas, the heat value of Styrene is 4395.2 kJ /mol.

Molar mass of styrene is 104.15 g /mol

For converting energy 4395.2 kJ /mol to kJ /kg

$= (4392.2 * 10^3 )/104.15$

$= 42.17 * 10^3 kJ /kg  ---- (1)$

Now, kJ /kg = 0.429 Btu /lb

Putting in (1)

$= (42.17 * 10^3) * 0.429 Btu /lb$

$= 18092.02 Btu /lb$

Hence, option b is correct