The combination reaction between hydrogen gas and oxygen gas proceeds according to the following balanced thermochemical...

Question

Question

The combination reaction between hydrogen gas and oxygen gas proceeds according to the following balanced thermochemical equa

Answer 1

Answer #1

Mass of hydrogen reacted = 6.06 gm

Moles of Hydrogen gas = 6.06 g / 2.016 g/mol = 3.0059 Moles

Mass of oxygen reacted = 40 gm

Moles of oxygen gas = 40 g / 32 g/mol = 1.25 Moles

Limtiing reagent is oxygen

Moles of oxygen reacted = 1.25 moles

According to the balanced equation, one mole of oxygen will release 572 kJ of energy

Amount of heat released by 1.25 mol of O2 = 1.25 mol x -572 kJ/mol = -715 kJ

Siince energy is released from the reaction, we need to add the negative reaction

Hence the correct answer is option C) -715

The combination reaction between hydrogen gas and oxygen gas proceeds according 2H2(g) + O2(g) → 2H2000 AH = -572 kJ How much

Answer 2

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