TUTOR Enthalpy Changes i The reaction of hydrogen chloridela) with oxygeniz) to

Question

TUTOR Enthalpy Changes i The reaction of hydrogen chloridela) with oxygeniz) to form wateriz) and chlorlnelg) proceeds ws Sollow When 12.2 g HC) neacts with sufficient 0),9.54 kJ is evolved Calculate the value of ,"for the chemical cquation given. Wmol Show Approach Hide Tutor Steps Calculate the enthalpy change per mole of reaction, AJf. amount of reaction 8.365 102 mo kJ/mol X Next)(4 of 4 of energy transferred by the amount (mol) of reaction that took place. Remember to add the cormect sign for A,jfF to your Try Another Version item atempts remaining

Explanation / Answer

Ans :

12.2 g HCl = 12.2 / molar mass of HCl

= 12.2 / 36.46

= 0.335 mol

So 0.335 mol of HCl evolves 9.54 KJ of energy

So 4 mol of HCl will evolve : ( 4 x 9.54) / 0.335

= 113.9 KJ/mol

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