Consider the reaction N2(g) + 3H2(g) → 2NH3(g)ΔHorxn = −92.6 kJ/mol If 2.0 moles of N2 react with 6.0 moles of H2 to form NH3, calculate the work done (in joules) against a pressure of 1.0 atm at 25°C. What is ΔU for this reaction? Assume the reaction goes to completion.

Question
Asked Oct 22, 2019

Consider the reaction
 
N2(g) + 3H2(g) → 2NH3(g)

ΔHorxn = −92.6 kJ/mol

 
If 2.0 moles of N2 react with 6.0 moles of H2 to form NH3, calculate the work done (in joules) against a pressure of 1.0 atm at 25°C.
 
What is ΔU for this reaction? Assume the reaction goes to completion.

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Expert Answer

Step 1

Thermodynamic is the branch of chemistry that mainly deals with the heat transfer between system and surroundings. Here system is the substance for which the heat content is studied and remaining part of universe is consider as the surroundings.

Step 2

The heat content of any substance or reaction system can be expressed in terms of enthalpy whereas the randomness in the system is associated with the entropy of system.

Step 3

The work done in the gas expansion is the product of...

w = -PAV
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w = -PAV

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