Environmental Engineering question help A 1-g sample of an unknown fuel is tested in a 2-L...
1. If nitrogen gas has a density of 1.14 g/L, and an unknown gas
has a density of 4.2 g/L at the same temperature and pressure, what
is the ratio of the rate of effusion of the known gas to the rate
of effusion of nitrogen?
2. The combustion reaction for octane burning in oxygen is:
2 C8H18 (l) + 25 O2(g)
→ 16 CO2(g) +18 H2O(g)
∆H = -10869 kJ .
Suppose an oxygen bomb calorimeter is loaded with oxygen...
A bomb calorimeter is filled with 4.4 atm of an unknown gaseous hydrocarbon fuel and an excess of oxygen gas at a temperature of 21 °C. The bomb calorimeter has a volume of 5 L and a heat capacity of 8.34 kJ/K. After the combustion reaction is complete the final temperature of the calorimeter is found to be 231.6 °C. Answer the following questions based on this information. (a) What amount of heat in kJ was released from the combustion...
Please help Environmental engineering homework steps
needed
Tutorial 4 Fall Semester. 2018 1. Tests for common ions are run on a sample of water and the results are shown below ICO,.= 165mg/L So173 mg/L C202 mg/L Draw a milliequivalent-per-liter bar diagram and determine the error in the ion balance. Na+ = 124 mg/L Mg28 mg/L Ca70 mg/L 2. A laboratory measures the following concentrations of ions in a sample of water CATIUONS CONCA As COcENRATION / Calcium 4 Magnesium 10.0...
QUESTION 2 a 17.9 g sample of an unknown metal is heated to 63.1 °C is placed in 18.5 g of water in a coffee cup calorimeter causing the temperature of the water to raise from 23.0°C to 25.3 °C. Calculate the heat released by the metal. The specific heat of the metal is 0.655J/g °C.x
Taibah University College of Engineering 1-1 i what is Environmental Engineering? And why ius),upon"m? and solves envivemeatol Pcblem 2- 21 Given below are the coucentratious af some chemicats in a water sampiss i mg/L Components Concentration (g/) Ca Mg CI NO3 H+ Note: MW of Mg 24 Concentration (Moea/t 50 20 70 80 10 Convert the given concentrations ", moles/L and include the answer in the . table?
Taibah University College of Engineering 1-1 i what is Environmental Engineering? And...
14K 8.3 Heat Energy and Chemical Reactions 9. A synthetic fuel blend is tested by bomb calorimetry. It is found that an 80.10 Sample teens 28,096 kJ of heat. What is the fuel value of this blend, in k/? 10. Is the following reaction endothermic/exothermic? AH...= -1,269.8W 2 Ca (s) + O2 (g) → 2 Cao (s)
Is this answer correct? Also, please help me with the 2nd
question.
1. A 1.500-g sample of potassium hydrogen carbonate is decomposed by heating to produce 1.040 g of potassium carbonate. Calculate the theoretical yield and percent yield of K CO. 2 KHCO3() 4 K2CO3(s) + H2O(g) + CO2(g) 1.500, KHEO3(-)x mo Brux Imot tos 138.2.109 K2CO3 100.129 Hle, 2 mot Kaso, x mol becos 1.0351x100 -0.996 2 (100% 1.040g 1.035 g K2CO3 - 100% 2. A 1.750-g sample containing...
Question 4 2 pts In lab, a student weighed out 1.576 g of unknown in a beaker. The student added 58 mL DI water and followed the protocol in the lab to filter and dry the product, which had a final mass of 0.616 g. The filtrate was tested, and the student determined that CaCl2 2H2O was the limiting reactant. Determine the percent by mass composition of CaCl2 2H20 in the original unknown sample. Note: These numbers ate for calculation...
Question 2 (a)A new engineering software is being developed and claim that it is more than 98% compatible with the existing software. A sample of 200 engineering firms tested the new software and 180 of them agreed with the manufacturer. Test at 5% significance level whether the claim is true. (9 marks) (b) The noise level of a newly designed low noise transistor is normally distributed with mean and standard deviation 0.7 dB. The null hypothesis u-24dB is to be...
1 pts Question 14 An automobile engine consumes fuel at a rate of 32 L/h and delivers 90 kW of power to the wheels. The fuel has a heating value of 44,000 kJ/kg and a density of 800 kg/m ( 1 1000L) The thermal enciency of this engine is closer to: