Calculate the number of kJ released for the reaction shown below, if you begin with 12...

Question

Question

Answer 1

Answer #1

Molar mass of H2 = 2.016 g/mol

mass(H2)= 12 g

use:

number of mol of H2,

n = mass of H2/molar mass of H2

=(12 g)/(2.016 g/mol)

= 5.952 mol

Since Δ H is negative, heat is released

when 2 mol of H2 reacts, heat released = 572.0 KJ

So,

for 5.952 mol of H2, heat released = 5.952*572.0/2 KJ

= 1.702*10^3 KJ

Answer: 1.7*10^3 KJ

Answer 2

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