Hi Can you help me with #5 please thank you s. The visible lines in the hydrogen
ID: 554595 • Letter: H
Question
Hi Can you help me with #5 please thank you s. The visible lines in the hydrogen spectra are frequently referred to as the Balmer series. Calculate the frequency of the line that results from an electron moving from n-4 to n-2. Wha color would this line be be? (4 pts) Show all your work and always in clude units. Table sugar, or sucrose, C,H,Ogy has a Calorie content of 3.87 kcal/gram (10 pts) a. Write a balanced reaction for the combustion of sucrose. Based on the Calorie content in sucrose, calculate the value of AH for the combu reaction above in ki/mol.
Explanation / Answer
ANSWER:
The problem can be solved by using Balmer formulla
1 / = R[1 /n12 - 1 /n22] =====1)
n1 = 2, n2 = 4
R = Rydberg constant = 1.0968 X 107m-1
Inserting the values in equation 1)
1 / = 1.0968 X 107m-1 [1 / 22 - 1 / 42] = (12 / 64 ) X 1.0968 X 107m-1 = 2.056 X 106m-1
Or = 1 / 2.056 X 106m-1
Further c ( velocity of light ) = Frequency (v) X
v = c / = 3.0 X 108 ms-1 X 2.056 X 106 m-1 = 6.168 X 1014 s-1
This frequency correspond to visible range ( 4X 1014 s-1 to 8 X 1014 s-1) . The frequency will correspond to Blue color as its frequency range from 6.06 X 1014 s-1 to 6.68 X 1014 s-1 .