Questions from General Chemistry

Q: For the reaction S(s) + O2(g)

For the reaction S(s) + O2(g) SO2(g), ∆H = -296 kJ per mole of SO2 formed. a. Calculate the quantity of heat released when 1.00 g of sulfur is burned in oxygen. b. Calculate the qu...

Q: When ethanol (grain alcohol, C2H5OH) is burned in oxygen

When ethanol (grain alcohol, C2H5OH) is burned in oxygen, approximately 1360 kJ of heat energy is released per mole of ethanol. C2H5OH(l) + 3O2(g) 2CO2(g) + 3H2O(g) a. What...

Q: Given the following hypothetical data: X(g) +

Given the following hypothetical data: X(g) + Y(g) XY(g) for which ∆H = a kJ X(g) + Z(g) XZ(g) for which ∆H = b kJ Calculate ∆H for the reaction Y(g) + XZ(g)...

Q: Given the following data: C(s) + O2

Given the following data: C(s) + O2(g) CO2(g) ∆H = -393 kJ 2CO(g) + O2(g) 2CO2(g) ∆H = -566 kJ Calculate ∆H for the reaction 2C(s) + O2(g) CO...

Q: In Fig. 10.1, what kind of energy does

In Fig. 10.1, what kind of energy does ball A possess initially when at rest at the top of the hill? What kind of energies are involved as ball A moves down the hill? What kind of energy does ball A p...

Q: Given the following data: S(s) + 3

Given the following data: S(s) + 3/2 O2(g) SO3(g) ∆H = -395.2 kJ 2SO2(g) + O2(g) 2SO3(g) ∆H = -198.2 kJ Calculate ∆H for the reaction S(s) + O2(g)...

Q: Given the following data: C2H2(g) + 5

Given the following data: C2H2(g) + 5/2O2(g) 2CO2(g) + H2O(l) ∆H = -1300. kJ C(s) + O2(g) CO2(g) ∆H = -394 kJ H2(g) + 1/2O2(g) H2O...

Q: What does petroleum consist of? What are some “fractions”

What does petroleum consist of? What are some “fractions” into which petroleum is refined? How are these fractions related to the sizes of the molecules involved?

Q: What is the “greenhouse effect”? Why is a certain level

What is the “greenhouse effect”? Why is a certain level of greenhouse gases beneficial, but too high a level dangerous to life on earth? What is the most common greenhouse gas?

Q: A 50.0-g sample of water at 100.

A 50.0-g sample of water at 100. °C is poured into a 50.0-g sample of water at 25 °C. What will be the final temperature of the water?