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Problem: Hydrazine (N2H4) is used as a rocket fuel because it reacts very exothermically with oxygen to form nitrogen gas and water vapor. The heat released and the increase in number of moles of gas provide thrust. Calculate the enthalpy of reaction.

🤓 Based on our data, we think this question is relevant for Professor Di Lorenzo's class at UNE.

FREE Expert Solution

We are asked to calculate the enthalpy of the give reaction.

To calculate the ΔH°rxn using bond energies, we’re going to use the following equation:

H°rxn = Hbond reactants - Hbond products


Let’s first figure out what kind of bonds and how many moles are present in each reactants and products because the given bond energies are per mole.

Let us write the balanced reaction.

Balanced Reaction:  N2H4(g) + O2(g)  N2(g) + 2 H2O(g)

*a coefficient 2 is added to H2O to balance the equation


Draw the structure of each compound.

Reactants:

 N2H4:

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Problem Details

Hydrazine (N2H4) is used as a rocket fuel because it reacts very exothermically with oxygen to form nitrogen gas and water vapor. The heat released and the increase in number of moles of gas provide thrust. Calculate the enthalpy of reaction.

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Bond Energy concept. If you need more Bond Energy practice, you can also practice Bond Energy practice problems.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Di Lorenzo's class at UNE.

What textbook is this problem found in?

Our data indicates that this problem or a close variation was asked in Chemistry: The Molecular Nature of Matter and Change - Silberberg 8th Edition. You can also practice Chemistry: The Molecular Nature of Matter and Change - Silberberg 8th Edition practice problems.