QUANTUM CHEMISTRY AND CHEMICAL ENGINEERING - EXAMPLE 31.1 : As an approximation, let v = Zc / 137 where v is the radial velocity for 1 s electron of an element, c is the speed of light, Z is the atomic number. For gold with Z = 79, find the radial velocity of its 1 s electron, in term of c and percentage of the speed of light. (b) As an approximation, let A x A = 1 - Z x Z / 18769 where A is the ratio of the relativistic and non-relativistic Bohr radius. Find the value of A.

Answer / kangchuentat

QUANTUM CHEMISTRY AND CHEMICAL ENGINEERING - ANSWER 31.1 : (a) Approximately v = Zc / 137 = (79 / 137) c = 0.5766 c or 57.66 % of the speed of light. (b) Approximately A x A = 1 - Z x Z / 18769 = 1 - 79 x 79 / 18769 = 0.667 then A = 0.817. The answer is given by Kang Chuen Tat; PO Box 6263, Dandenong, Victoria VIC 3175, Australia; SMS +61405421706; chuentat@hotmail.com; http://kangchuentat.wordpress.com.

Is This Answer Correct ?    0 Yes 0 No

Post New Answer

More Chemical Engineering Interview Questions

Why an electromagnetic flow meter cannot be used for gases, steam and oil flow measurements?

4 Answers  

What's the difference between superphosphate and triple super phosphate fertilizer?

3 Answers  

Question 62 – The names of the flow streams could be represented by : H1 for first hot stream, H2 for second hot stream, C1 for first cold stream, C2 for second cold stream. Data of supply temperature Ts in degree Celsius : 150 for H1, 170 for H2, 30 for C1, 30 for C2. Data of target temperature Tt in degree Celsius : 50 for H1, 169 for H2, 150 for C1, 40 for C2. Data of heat capacity Cp in kW / degree Celsius : 3 for H1, 360 for H2, 3 for C1, 30 for C2. (a) Find the enthalpy changes, dH for all streams of flow H1, H2, C1 and C2 in the unit of kW. Take note of the formula dH = (Cp) (Tt - Ts). (b) Match the hot streams H1 and H2 with the suitable cold streams C1 and C2 to achieve the maximum energy efficiency.

1 Answers  

what is the purpose of capacitor? and capacitor load means what? how does it connect?

0 Answers  

what is difference between urea and NPK fertiliser?

2 Answers  

when liquid stored in spherical vessel,equilibrium shift towards liquid.what is the benefit of it?

1 Answers  

Question 84 - In Mendelian genetics, yellow (Y) is dominant to green (y) and round (R) is dominant to wrinkled (r). (a) What is the probability P of Rr x Rr producing wrinkled seeds? (b) What is the probability P of Yy x yy producing green seeds? (c) What is the probability that RRYy x RrYy would produce RrYy?

1 Answers  

Suppose you have hot fluid and cold water, what fluid you should flow in shell side and tube side in a shell and tube heat exchanger and why

6 Answers  

What is difference between Overall heat transfer coeficient & individual heat transfer coefficient

3 Answers   NFTDC, CVSR,

what is ejector capacity and ejector economy

1 Answers  

i am a prefinal year student of polymer engineering .could you please send the latest question papers regarding entrace exam.

0 Answers   IOCL,

What is higher heating value and lower heating value? Is it positive or negative?

0 Answers  

  • Civil Engineering Interview Questions Civil Engineering (4590)
  • Mechanical Engineering Interview Questions Mechanical Engineering (3680)
  • Electrical Engineering Interview Questions Electrical Engineering (15666)
  • Electronics Communications Interview Questions Electronics Communications (2629)
  • Chemical Engineering Interview Questions Chemical Engineering (737)
  • Aeronautical Engineering Interview Questions Aeronautical Engineering (78)
  • Bio Engineering Interview Questions Bio Engineering (30)
  • Metallurgy Interview Questions Metallurgy (95)
  • Industrial Engineering Interview Questions Industrial Engineering (198)
  • Instrumentation Interview Questions Instrumentation (2854)
  • Automobile Engineering Interview Questions Automobile Engineering (131)
  • Mechatronics Engineering Interview Questions Mechatronics Engineering (41)
  • Marine Engineering Interview Questions Marine Engineering (60)
  • Power Plant Engineering Interview Questions Power Plant Engineering (166)
  • Engineering AllOther Interview Questions Engineering AllOther (1326)