Question
Download Solution PDFFor the reaction N2(g) + 3H2(g) \(\rightleftharpoons\) 2NH3(g) ΔH = -ve :
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
Haber's process:
- This process is used in large scale preparations of ammonia.
N2 + 3H2 → 2NH3
- During the process, nitrogen and hydrogen are used in the ratio 1:3.
- The process is exothermic ΔH = -ve in nature means heat is produced in the process.
- According to the Le-chateliar principle, the temperature is kept high to speed up the process.
- The gaseous ammonia produced is converted to liquid ammonia to remove the products formed.
- This drives the reaction forward.
Equilibrium Constants:
- The constants Kp and Kc are both equilibrium constants.
- Kp is used when the concentration terms are given in partial pressures i.e, in gaseous reactions.
- Kc is used when the reaction terms are expressed in molarities.
- The relation between Kp and Kc is given by:
\({K_p} = {K_c} \times {\left( {RT} \right)^{\Delta n}}\) where R = Universal gas constant, T = Temperature, and \(\triangle n\) = change in moles of gases in the reaction.
Calculation:
- The relation between Kp and Kc is
\({K_p} = {K_c} \times {\left( {RT} \right)^{\Delta n}}\)
For the reaction
N2(g) + 3H2(g) \(\rightleftharpoons\) 2NH3(g)
\(No.\;of\;moles\;of\;products = 2\)
\(No.\;of\;moles\;of\;reactants = 3 + 1 = 4\)
\(Change\;in\;number\;of\;moles\;of\;gases = {n_{products}} - {n_{reactants}} = \;\Delta n\)
\( = 2 - 4 = - 2\)
Hence,
\({K_p} = {K_c} \times {\left( {RT} \right)^{-2}}\)
Hence, or the reaction N2(g) + 3H2(g) \(\rightleftharpoons\) 2NH3(g) ΔH = -ve, \({K_p} = {K_c} \times {\left( {RT} \right)^{-2}}\)
Last updated on Jun 6, 2025
-> The HTET TGT Applciation Portal will reopen on 1st June 2025 and close on 5th June 2025.
-> HTET Exam Date is out. HTET TGT Exam will be conducted on 26th and 27th July 2025
-> Candidates with a bachelor's degree and B.Ed. or equivalent qualification can apply for this recruitment.
-> The validity duration of certificates pertaining to passing Haryana TET has been extended for a lifetime.
-> Enhance your exam preparation with the HTET Previous Year Papers.