How much Na2O2 would need to react in order to release 1000 kJ of heat? Show...

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Question

How much Na2O2 would need to react in order to release 1000 kJ of heat? Show your work.

science chemistry

Answer 1

Answer #1

The reaction of Na2O2 with water is given below.

2Na₂O₂(s)+ 4H₂O(l) ----> 4NaOH(aq) + O₂(g). ∆H° = -126kJ

126 kJ heat release from.reaction of 2 mole of Na2O2.

So, to release 1000kJ energy amount of Na2O2 needed is,

1000kJ)×(2mole Na2O2/126kJ) = 15.873mole Na2O2.

Now molar mass of Na2O2 is 77.98g/mole

Thus amount of Na2O2 in g is = 15.873mol × 77.98g/mol = 1237.78g

Thus to release 1000kJ energy , 15.873 mile or 1237.78g of Na2O2 is needed.

Answer 2

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