calculate energy

Question

1.find the number of a quanta of radiation of frequency 4.67*1013s-1 that must be absorabed in order to melt 5gm of ice. energy required to melt 1gm of ice is 333j?2.calculate the velocity of electrostatic potential energy of to electrons separated by 3.0 in vacuum. express your answers in jouls and electron volt?3.energy required to stop the ejection of electrons is 0.24 eV. calculate the work function when radiationsof ?=253.7 nm strikes the plate?

Pankaj · Accepted Answer

UsingWe can calculate the energy of one photon usingE = hvGiven that v = 4.67&times;1013s-1h = 6.62 &times;10&minus;34 J.SWe get, E = (6.62 &times;10&minus;34)( 4.67&times;1013s-1 ) = 30.94 &times; 10-21 JNumber of quanta required to melt five gram of ice = 1665/30.94 &times; 10-21 =53.81 &times; 1021

Physical Chemistry> calculate energy...

vrashank joshi , 12 Years ago

Pankaj

Provide a better Answer & Earn Cool Goodies

LIVE ONLINE CLASSES

Ask a Doubt

Which of the following aqueous solutions remains neutral afterelectrolysis

Physical Chemistry

Physical Chemistry

True or false when an electron in ground state of hydrogen atom is excited with an energy that is greayer than e2-e1 but less than e3-e1 the electron will get excited n=2

Physical Chemistry

18 19 gram mixture of na2co3 and nahco3 on heating gives 2.2 gram CO2 gas find the percent nahco3 (by mass) in mixture

Physical Chemistry

A 100 cm cube solution of sodium carbonate is prepared by dissolving 8.653 g of salt in water the density of solution is 1.0816g per ml what are the molarity and molality of the solution.

Physical Chemistry

Physical Chemistry> calculate energy...

vrashank joshi , 12 Years ago

Pankaj

Provide a better Answer & Earn Cool Goodies

LIVE ONLINE CLASSES

Ask a Doubt

Other Related Questions on Physical Chemistry

Which of the following aqueous solutions remains neutral afterelectrolysis

Physical Chemistry

Physical Chemistry

True or false when an electron in ground state of hydrogen atom is excited with an energy that is greayer than e2-e1 but less than e3-e1 the electron will get excited n=2

Physical Chemistry

18 19 gram mixture of na2co3 and nahco3 on heating gives 2.2 gram CO2 gas find the percent nahco3 (by mass) in mixture

Physical Chemistry

A 100 cm cube solution of sodium carbonate is prepared by dissolving 8.653 g of salt in water the density of solution is 1.0816g per ml what are the molarity and molality of the solution.

Physical Chemistry