+91-8076753736[email protected]
logo
logo
-->

Thermodynamics

Question
CBSEENCH11006265
Wired Faculty App

For the reaction
2 NO left parenthesis straight g right parenthesis space plus space straight O subscript 2 left parenthesis straight g right parenthesis space space space rightwards arrow space space space 2 NO subscript 2 left parenthesis straight g right parenthesis comma
calculate increment straight G at 700K when enthalpy and entropy changes are -113 kJ mol-1 and -145 JK-1 mol-1 respectively.

Solution

  Here comma space space increment straight H space equals space minus 113 space kJ space mol to the power of negative 1 end exponent space space space space space space space space space space space space space space space space equals negative 11300 space straight J space mol to the power of negative 1 end exponent space space space space space space space space space space space increment straight S space equals space minus 145 space JK to the power of negative 1 end exponent space mol to the power of negative 1 end exponent
According to Gibb's Helmoltz equation,  
 space space space space space space space space increment straight G space equals space increment straight H minus straight T increment straight S therefore space space space space space space space increment straight G space equals space minus 113000 space 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 space space space equals space minus left parenthesis 700 straight K right parenthesis space cross times space left parenthesis negative 145 JK to the power of negative 1 end exponent space mol to the power of negative 1 end exponent right parenthesis space space space space space space space space space space space space space space space space equals space minus 113000 space straight J space mol to the power of negative 1 end exponent space plus space 101500 space 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 space space space equals space minus 11500 space straight J space mol to the power of negative 1 end exponent

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.

Mock Test Series

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation