What is q when 5.00 mL ethyl ether is burned?

In earlier times, ethyl ether was commonly used as an anesthetic. It is, however, highly flammable. When 5.0 mL of ethyl ether C4H10 (l), (d=0.714 g/mL) is burned in a bomb calorimeter, the temperature rises from 23.5°C to 39.7. The calorimeter heat capacity is 10.24 kJ/°C. What is q when 5.00 mL ethyl ether is burned? (Round yo ...continues

Is this process exothermic or endothermic?

When 1.34 g of potassium bromide dissolves in 74.0 g of water in a coffee-cup calorimeter, the temperature drops from 18.000°C to 17.279°C. Assume all the heat absorbed in the solution process comes from the water. (Specific heat of water = 4.18 J/g•°C). Is this process exothermic or endothermic? Urea, (NH2)2 (CO), is used i ...continues

How many kilojoules of energy are liberated

In photosynthesis, the following reaction takes place: 6CO2 (g) + 6H2O (l) 6O2 (g) + C6H12O6 (s) H = -637 kJ. How many kilojoules of energy are liberated when 15.00 g of glucose, C6H12O6, is burned? (Round your answer to two decimal places)

Final Temperature of a Solution

Urea, (NH2)2 (CO), is used in the manufacture of resins and glues. When 5.00 g of urea is dissolved in 250.0 mL of water (d=1.00 g/mL) at 30.0°C, 27.6 kJ of heat is absorbed. What is the final temperature of the solution in kJ? The density of water is 4.18 J/g·°C. What is the final temperature in °F? F = °C x 1.8 + 32 (Round you ...continues

Calorimeter

Fructose is a sugar commonly found in fruit. A sample of fructose, C6H12O°C, weighing 4.50 g is burned in a bomb calorimeter. The heat capacity of the calorimeter is 2.115 x 104 J/°C. The temperature in the calorimeter rises from 23.49°C to 27.71°C. What is q for the calorimeter? (Your answer should be in kJ and rounded to the n ...continues

Molar Concentrations

Calculate the molar concentrations, I-, disulfur octaoxide, disulfur trioxide. From [stock concentrations] 15 ml of .20 M potassium iodine, 20 ml of .10M K2S2O8, and 10 ml of .0050M Na2S2O3, I am supposed to figure out the molar concentrations of I-, disulfur octaoxide, and disulfur trioxide. First I thought just use the c ...continues

Write a balanced equation for the neutralization of acetic acid with NaOH

Describe the rate limiting step; Give a practical every day example of this example of this process and provide web site

pH and molarity

You add 5 drops of .100 M HCl to 100ml of "pure" water. Assuming that the volume of one drop is .035ml, calculate the expected pH of the resulting solution. At first I thought I should multiply .035ml by 5 and then add the value found to 100ml. But now I am stumped. Should I add, they give the molarity of water, 1 x 10^ ...continues

Equilibrium constant expression (K)

1. Write the equilibrium constant expression (K) for the following reaction CS↓2 (g) + 4H↓2 (g) ↔ CH↓4 (g) = 2H↓2S (g) 2. Write the equilibrium constant expression (K) for the following reaction CuO (s) + H↓2 (g) ↔ Cu (s) + H↓2O (g) 3. Ammonium chloride is sometimes used as ...continues

Which way does the equilibrium shift in each of the following systems?

1. The pressure on each of the following systems is decreased from 5 atm to 1 atm. Which way does the equilibrium shift in each of the following systems? a.) 2CO↓2 (g) ↔ 2CO (g) + O↓2 (g) b.) H↓2 (g) + I↓2 ↔ 2HI (g) 2. What is the pH of a solution that is 7.2 X 10^-14 M? Is this neutr ...continues