Question

1. Given the following regression lines, calculate T_i and T_f if a reactant was added at t=3.5 min

   1. T= 0.10013*t + 16.46245

   2. T= -0.14998*t + 30.00143

   3. Which equation is used to calculate T_i? Which is used to calculate T_f?

      1. Calculate T_i and T_f

2. Calculate Hfor the reaction: NH3(g)+5O2(g)->4NO(g)+6H2O(g)

   1. N2(g)+O2(g)->2NO(g)

   2. N2(g)+3H2(g)->2NH3(g)

   3. 2H2(g)+O2(g)->2H2O(g)

Compound	Hf(kJ/mol)
H2(g)	0.00
H2O(g)	-241.83
N2(g)	0.00
NH3(g)	-45.94
NO	+90.2
O2(g)	0.00

1. What’s the purpose of a calibration curve?

2. What causes absorption?

Answer 1

♡ Given equation: To 0.10013 *t + 16.46 245 -0 Equation can used for calculation of P & Tf first. In eq? ① assume that X= 0.10013*t. Y. 16.4 6245 formula is for calculating 94 94 , suppose etb. Porco fey) (8x 2) - (<2) (Sxy) I ne sac?) - 5 (2)2 for be mlazy) – (**) (ay)/M(*x2) - 2002 weite all the values, which are using in the formulas. Now es n is Ta •O.1498 * & + 30.00143 1 Xoa -0.14 998 * t 4.30.00143 Now t= 15 ( given) x = 0.100138 3.5 + y = 16.46875 x = -0.14 99 8X3-5 You 30.00143 Both the formulas mentioned as above Sky {y: 48:46388 {22, 0.3983 {xa 0.17453 put the value in formula 8.1093 0.03046 (46.46388) (0.5963) - (0.14453)(8.1098) (0.3983) C 0.03044) P. -99.95 ly on calculated iy .+4.26.

Q2 Given Reaction : - Ny (g) + O₂(g) → 2NO Cg -- (Multiply by ) Al + 3 H2 QH₂ € 0 → 2NH₂ Cao -(" - letgo (9) -(" "da neverse " 3) do eco 0 x 2 + ( eqr. W x 2 h reverse) & Cego. ③ x 3) net e92 ANCH₃ + 50 uno of 610 = (2x 90 •2) + ( 45.94x2)+(3x (+241.83 Ha 180.4¢ 91.88 & C-72 5.49) AH. -453.29 kr/mol Ans. In analytical Chemistry , a calibration curve, is a general method for determining the concentration lot a cubelance in an unknown o sample by comparing the unknown to set of standard samples of unknown concentration

QUESTION NO. 4 is incomplete