Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • Engineering
  • Solve it, - Given : Based on the above thermochemical equations, find out which one of the following algebr - Redox Reaction and Electrochemistry - JEE Main

 Given : 

(i) C (graphite)+ O_{2}(g)\rightarrow CO_{2}(g);\\\Delta rH^{\Theta }=x\: kJ mol^{-1}

(ii) C (graphite)+\frac{1}{2} O_{2}(g)\rightarrow CO_{2}(g);\\\Delta rH^{\Theta }=y \: \: kJ mol^{-1}

(iii) CO(g)+\frac{1}{2} O_{2}(g)\rightarrow CO_{2}(g);\\\Delta rH^{\Theta }= z\: kJ mol^{-1}

Based on the above thermochemical equations, find out which one of the following algebraic relationships is correct ?

  • Option 1)

    y = 2z - x

  • Option 2)

    x= y - z

  • Option 3)

    z = x+y

  • Option 4)

    x = y + z

Answers (1)

best_answer

 

Electrochemistry -

It is the study of production of electricity from energy released during spontaneous chemical reactions and the use of electrical energy to bring about non spontaneous chemical transformations.

Balancing of Redox Reactions -

Oxidation number method

- wherein

1. Write the correct formula for each reactant and product.

2. Identify atom whose oxidation number is changed.

3. Calculate increase / decrease in oxidation number per atom and for the entire molecule / ion in which it occures.

4. Add H^{+}/OH^{-} on appropriate side so that the total ionic charges of reactants and products are equal.

5. Make numbers of hydrogen atoms in the expression on the two sides equal by adding H_{2}O to reactant or product

 

 

 

Oxidation number and oxidation state -

A term that is often used interchangeably with the oxidation number is the oxidation state. This implies oxidation number denote the oxidation state of an element.

-As we have learned thermodynamic

 

C_{(graphite)}+O_{2}(g)\rightarrow CO_{2}(g)\Delta _{r}H^{0}=xKJ/mol----(1)

C_{(graphite)}+\frac{1}{2}O_{2}(g)\rightarrow CO_{2}(g)\Delta _{r}H^{0}=yKJ/mol-----(2)

CO(g)+\frac{1}{2}O_{2}(g)\rightarrow CO_{2}(g)\Delta _{r}H^{0}=zKJ/mol-------(3)

(1)=(2)+(3)

X=Y+Z


Option 1)

y = 2z - x

Option 2)

x= y - z

Option 3)

z = x+y

Option 4)

x = y + z
Posted by

admin

View full answer

JEE Main high-scoring chapters and topics

Study 40% syllabus and score up to 100% marks in JEE

Similar Questions

Trending Articles/News

anam-khan

JEE Main Maths 2025: Five tips to score high marks in ‘toughest’ subject; most important chapters
anam-khan

JEE Main 2025 exam city intimation slip for session 1 soon at jeemain.nta.nic.in
anam-khan

Focus on modern physics, formulas to solve tricky problems; 5 tips to tackle JEE Main physics 2025

Latest Question