Ask a Doubt
Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 11-science Answered

write a relation between delta G and Q and define the meaning of each term and answer the following a) why a reaction proceeds forward when Q< K and no net reaction occurs when Q = K b) explain the effect of increase in pressure in terms of reaction quotient Q for the reaction CO ⇆ CH4(g) + H2O(g) (ii) for the reaction, N2(g) +3H2(g)⇆ 2NH(g) at 400K , Kp = 41, find the value Kp for the reaction 2N2(g) +6H2(g) ⇆ 4NH3(g)
Asked by gganga | 10 Apr, 2018, 06:02: PM
Expert Answer
Relation space between space increment straight G space and space straight Q space is comma increment straight G space equals space increment straight G to the power of degree space plus space RT space lnQ Where comma increment straight G space equals Gibb apostrophe straight s space energy space change space increment straight G to the power of degree equals space Standard space Gibb apostrophe straight s space energy space change straight R equals space Gas space constant straight T equals space Absolute space temperature straight Q equals space Reaction space quotient left parenthesis straight a right parenthesis space space space space space space As comma space space increment straight G to the power of degree space end exponent equals space minus RT space lnK therefore space increment straight G space equals space minus RT space lnK space plus space RT space lnQ space space space space space space space space space space space equals RT space lnQ minus RT space lnK space space space space space increment straight G equals space RT space ln straight Q over straight K If space straight Q greater than space straight K comma space then space increment straight G space will space be space negative. Reaction space proceeds space in space straight a space forward space direction. If space straight Q equals space straight K comma space then space increment straight G equals space 0 comma space no space net space reaction space occurs. left parenthesis straight b right parenthesis space space space space CO subscript open parentheses straight g close parentheses end subscript space space plus 3 space straight H subscript 2 open parentheses straight g close parentheses end subscript space rightwards harpoon over leftwards harpoon space CH subscript 4 open parentheses straight g close parentheses end subscript space plus space space straight H subscript 2 straight O straight K subscript straight c space equals fraction numerator open square brackets CH subscript 4 close square brackets open square brackets straight H subscript 2 straight O close square brackets over denominator open square brackets space space CO close square brackets open square brackets space straight H subscript 2 close square brackets cubed end fraction On space increasing space the space pressure space the space volume space is space decreased space and space hence comma space molar space concentartion space increases. If space the space pressure space is space doubled comma space molar space concentartion space will space also space be space doubled. straight Q equals fraction numerator 2 open square brackets CH subscript 4 close square brackets 2 open square brackets straight H subscript 2 straight O close square brackets over denominator 2 open square brackets space space CO close square brackets open square brackets 2 space straight H subscript 2 close square brackets cubed end fraction equals 1 fourth fraction numerator open square brackets CH subscript 4 close square brackets open square brackets straight H subscript 2 straight O close square brackets over denominator open square brackets space space CO close square brackets open square brackets space straight H subscript 2 close square brackets cubed end fraction therefore straight Q equals 1 fourth straight K subscript straight c
Answered by Varsha | 11 Apr, 2018, 01:10: PM

Concept Videos

Multiple Choice Questions Practice Test Subjective Questions Webinar Subjective Questions Pre Board Assessment
Answered Unanswered My Questions My Answers
CBSE 11-science - Chemistry
the total entropy change for system it's sourunding increase if process is
Asked by mankdubey670 | 06 Jun, 2022, 01:27: PM
ANSWERED BY EXPERT
CBSE 11-science - Chemistry
write a relation between delta G and Q and define the meaning of each term and answer the following a) why a reaction proceeds forward when Q< K and no net reaction occurs when Q = K b) explain the effect of increase in pressure in terms of reaction quotient Q for the reaction CO ⇆ CH4(g) + H2O(g) (ii) for the reaction, N2(g) +3H2(g)⇆ 2NH(g) at 400K , Kp = 41, find the value Kp for the reaction 2N2(g) +6H2(g) ⇆ 4NH3(g)
Asked by gganga | 10 Apr, 2018, 06:02: PM
ANSWERED BY EXPERT
CBSE 11-science - Chemistry
Give the relationship between Gibbs energy change and equilibrium constant?
Asked by Topperlearning User | 14 Aug, 2014, 04:44: PM
ANSWERED BY EXPERT
CBSE 11-science - Chemistry
What is the relation between Syntax error from line 1 column 49 to line 1 column 73. Unexpected '<mstyle '.?
Asked by Topperlearning User | 15 Jun, 2016, 05:46: PM
ANSWERED BY EXPERT
CBSE 11-science - Chemistry
At what temperature the entropy of a perfectly crystalline substance is zero?
Asked by Topperlearning User | 14 Aug, 2014, 04:51: PM
ANSWERED BY EXPERT
CBSE 11-science - Chemistry
For a reaction, Determine the temperature above which reaction will be spontaneous.
Asked by Topperlearning User | 14 Aug, 2014, 04:53: PM
ANSWERED BY EXPERT
CBSE 11-science - Chemistry
Calculate the entropy of vaporization of water if its enthalpy of vaporization is 186.5 kJmol-1?
Asked by Topperlearning User | 14 Aug, 2014, 05:00: PM
ANSWERED BY EXPERT
CBSE 11-science - Chemistry
For a water gas reaction at 1000°C the standard Gibb’s energy change is -8.1 kJ mol-1. Calculate the value of equilibrium constant?
Asked by Topperlearning User | 15 Jun, 2016, 05:46: PM
ANSWERED BY EXPERT
CBSE 11-science - Chemistry
Calculate the standard Gibbs energy change for the following reaction: Syntax error from line 1 column 49 to line 1 column 73. Unexpected '<mstyle '. Given that Syntax error from line 1 column 49 to line 1 column 73. Unexpected '<mstyle '. for Cu2+(aq) and Zn2+(aq) as 65 kJ mol-1 and -147.2 kJ mol-1 respectively.
Asked by Topperlearning User | 23 Sep, 2014, 03:28: PM
ANSWERED BY EXPERT
CBSE 11-science - Chemistry
For the reaction: Syntax error from line 1 column 49 to line 1 column 73. Unexpected '<mstyle '. Calculate the temperature at which Gibbs energy change ΔG is equal to zero. Predict the nature of the reaction at this temperature and above it.
Asked by Topperlearning User | 23 Sep, 2014, 03:39: PM
ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt