Heat of combustion of A(s) is -10 k"cal" mol^(-1) and that of B(s) is -15 Kcal mol^(-1). Mixture containing 3 moles A(s) and x moles B(s) on combustion released 105 kcal of heat. What is the value of x?

Heat of combustion of A(s) is -10 k"cal" mol^(-1) and that of B(s) is

1.	Heat of combustion of A(s) is -10 k"cal" mol^(-1) and that of B(s) is -15 Kcal mol^(-1). Mixture containing 3 moles A(s) and x moles B(s) on combustion released 105 kcal of heat. What is the value of x?
Answer» SOLUTION :`A+ O_(2) RARR Delta H_(1) = -10` Kcal `B + O_(2) rarr Delta H_(2) = -15` Kcal `3A xx xB = 10^(5)` `rArr 3(10) + x (15) = 10^(5) rARr x = 5`