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

Thermodynamics

Question
CBSEENCH11008099
Wired Faculty App

The energy required to break one mole of Cl— Cl bonds in Cl2 is 242 kJ mol–. The longest wavelength of light capable of breaking a single Cl — Cl bond is
(c= 3 x 108 ms–1and NA = 6.02 x 1023 mol–1)

  • 594 nm

  • 640 nm

  • 700 nm

  • 494

Solution

D.

494

Energy, E = NA
hv space equals space straight N subscript straight A space straight x space hc over straight lambda or space straight lambda space equals space straight N subscript straight A space straight x space hc over straight E straight lambda space equals space fraction numerator 6.626 space straight x space 10 to the power of negative 34 end exponent space straight x space 3 space straight x space 10 to the power of 8 space straight x space 6.02 space space straight x space 10 to the power of 23 over denominator 242 space straight x space 10 cubed end fraction space 494 space straight x space 10 to the power of negative 9 end exponent space straight m equals space 494 space nm

Some More Questions From Thermodynamics Chapter

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.

Give one difference between an isothermal and an adiabatic process.

For the process to occur under adiabatic conditions, the correct condition is

Define internal energy of a system

Define enthalpy.

Mock Test Series

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation