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Thermodynamics

Question
CBSEENCH11006285
Wired Faculty App

Using the data given below, calculate the value of equilibrium constant for the reaction

stack 3 HC identical to CH left parenthesis straight g right parenthesis with Acetylene below space space rightwards harpoon over leftwards harpoon space space straight C subscript 6 straight H subscript 6 left parenthesis straight g right parenthesis space at space 298 space straight K

assuming ideal behaviour.

increment subscript straight r straight G to the power of 0 space left parenthesis HC space identical to space CH right parenthesis space equals space 2.09 space cross times space 10 to the power of 5 space straight J space mol to the power of negative 1 end exponent comma space increment subscript straight r straight G to the power of 0 left parenthesis straight C subscript 6 straight H subscript 6 right parenthesis space equals space 1.24 space cross times space 10 to the power of 5 space straight J space mol to the power of negative 1 end exponent space and straight R space equals space 8.314 space JK to the power of negative 1 end exponent space mol to the power of negative 1 end exponent                       

Solution

We know, 
     increment subscript straight r straight G to the power of 0 space equals space sum from blank to blank of increment subscript straight f straight G to the power of 0 left parenthesis products right parenthesis space minus space sum from blank to blank of increment subscript straight f straight G to the power of 0 left parenthesis reactants right parenthesis equals space open square brackets increment straight G to the power of 0 left parenthesis straight C subscript 6 straight H subscript 6 right parenthesis close square brackets space minus space open square brackets 3 space cross times space increment subscript straight f straight G to the power of 0 left parenthesis HC space identical to CH right parenthesis close square brackets equals space 1.24 space cross times space 10 to the power of 5 straight J space mol to the power of negative 1 end exponent space minus space 3 space cross times space left parenthesis 2.09 space cross times space 10 to the power of 5 space straight J space mol to the power of negative 1 end exponent right parenthesis space equals space minus 5.03 space cross times space 10 to the power of 5 space straight J space mol to the power of negative 1 end exponent
  Now comma space increment subscript straight r straight G to the power of 0 space equals space minus 2.303 space RT space log space straight K or space space space space space minus 5.03 space cross times space 10 to the power of 5 space straight J space mol to the power of negative 1 end exponent equals negative 2.303 space cross times space left parenthesis 8.314 space JK to the power of negative 1 end exponent space mol to the power of negative 1 end exponent right parenthesis space cross times space left parenthesis 298 space straight K right parenthesis space log space straight K
therefore space space log space straight K space equals space fraction numerator 5.03 space cross times space 10 to the power of 5 straight J space mol to the power of negative 1 end exponent over denominator left parenthesis 2.303 space cross times space 8.314 space cross times space 298 right parenthesis end fraction straight J space mol to the power of negative 1 end exponent space space space space space space space space space space space space space equals space 88.15 therefore space space space space straight K space equals space Antilog space 88.155 space equals space 1.429 space cross times space 10 to the power of 88



Some More Questions From Thermodynamics Chapter

Define intensive properties.

Define extensive properties.

Why all living systems need to be 'open systems'?

Define state variables of a system.

From thermodynamic point of view, to which system the animals and plants belong?

What is a state function?

A thermodynamic state function is a quantity

What is reversible process in thermodynamics?

Define irreversible change.

Name the variable that is kept constant in isochoric process and isobaric process.

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