At 1 atm, how much energy is required to heat 53.0 g of H2O(s) at –10.0 °C to H2O(g) at 139.0 °C?

A) A 193.0 L sample of gas of the upper atmosphere at a pressure of 4.8 torr is compressed into a 256.0 mL container at the same temperature. What is the new pressure?

B) To what volume would the original sample have had to be compressed to reach a pressure of 7.0 atm?

one mole of ice at 0 C is turned completely into steam by heating under 1 atm pressure. calculate the entropy change in the system with specific heat capacity and enthalpy/heat values.assuming they are all constant.

Question: A reaction A + B <==> C has a standard free-...

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A reaction
A + B <==> C
has a standard free-energy change of -3.22 kj/mol at 25oC

What are the concentrations of A, B, and C at equilibrium if at the beginning of the reaction their concentrations are 0.30M, 0.40M and 0M respectively?

How would your answers above change if the reaction had a standard free-energy change of +4.88 kj/mol?
____ there would be no change to the answers.
____ All concentrations would be lower.
____ All concentrations would be higher.
____ There would be less A and B but more C.
____ There would be more A and B but less C.

[Problem 15-5, p.679 in Henry and Heinke.] Some of the important characteristics of each of the reactors at the Pickering Nuclear Generating Station are as follows:

                        Thermal output: 1744 MW

                        Number of fuel channels: 390

                        Fuel bundles per channel: 12

                        Uranium content per fuel bundle: 19.8 kg

                        Total weight of fuel bundle: 23.7 kg

                        Length of fuel bundle: 49.5 cm

                        Outside diameter of fuel bundle: 10.2 cm

                        Average burnup of fuel: 7500 MWd thermal/tonne U

Assume that each reactor achieves a capacity factor [CF] of 0.8, where CF = (Actual energy

produced) / (Perfect production). Calculate:

a)   The number of new fuel bundles per reactor required for each day of operation.

b)   The length of a rectangular container of cross-section, 2.6 m x 2.6 m, required to accommodate one year's output of spent fuel from each reactor. Assume that each bundle fits inside a rectangular box of outside dimensions 10.4 x 10.4 x 50 cm.

Problem 5.1

Consider the formation of glucose from carbon dioxide and water (i.e., the reaction of the photosynthetic process): 6CO2(g)+6H2O(l)?C6H12O6(s)+6O2(g).
The following table of information will be useful in working this problem:

Part A

Calculate the entropy change for this chemical system at 313 K .

Express your answer to four significant figures and include the appropriate units.

Part B

Calculate the enthalpy change for this chemical system at 313 K .

Express your answer to four significant figures and include the appropriate units.

Part C

Calculate the entropy change of the surroundings at 313 K .

Express your answer to three significant figures and include the appropriate units.

Part D

Calculate the entropy change of the universe at 313 K .

Express your answer to three significant figures and include the appropriate units.

Aluminum (FCC) with atom radius of 0.1431nm.

Find the distance between aluminum lattice plane (100) and (111), and calculate the density of that planes.

12. A 15.7-g sample of sodium carbonate is added to a solution of acetic acid weighing 19.4 g. The two substances react, releasing carbon dioxide gas to the atmosphere. After reaction, the contents of the reaction vessel weighs 28.4 g.

What is the mass of carbon dioxide given off during the reaction?

13. Cadmium metal reacts vigorously with yellow crystals of sulfur to produce a yellow powder of cadmium sulfide. A chemist determines that 112 g of cadmium reacts with 32.1 g of sulfur. How much cadmium sulfide could be produced from 45.4 g of cadmium metal?

18. Pick if it is a chemical or physcial reaction

Recycling one aluminum can save enough energy to charge the average smartphone for 14 hours?

Recycling one aluminum can save enough energy to charge a TV for 3 hours?

Recycling one aluminum can give an indicudualy roughly the energy to recycle 19 more aluminum cans?

Can someone please show the calculations for these energy equivalents? Thank you!

Be sure to answer all parts.

Calculate the pH during the titration of 40.00 mL of 0.1000 M HCl with 0.1000 M NaOH solution after the following additions of base:

(a) 20.00 mL

pH =

(b) 39.40 mL

pH =

(c) 52.00 mL

pH =

Calculate the pH of a 25 mg/L solution of hydrofluroic acid.

HF = H+ + F- Ka=10^-3.2

ALL WITH EXPLANATIONS please :)

12. Consider the following reaction: 2SO_2(g)  +  O_2(g)  ⇄  2SO_3(g)   +E            

Which of the following will not shift the equilibrium to the right?

            A.        Adding more O₂

            B.        Adding a catalyst

            C.        Increasing the pressure

            D.        Lowing the temperature

13.         Consider the following equilibrium system: CaCO_3(s)  ⇄ CaO_(s) +  CO_2(g)

            Which one of the following changes would cause the above system to shift left?

            A.        Add more CaO

            B.        Remove CaCO₃

            C.        Increase pressure

            D.        Remove CO2

14.         Consider the following equilibrium: SO₂Cl_2(g)  +  energy  ⇄  SO_2(g)  +  Cl_2(g)

            When the temperature is decreased, the equilibrium shifts

            A.        Left and [ SO₂Cl₂ ] increases

            B.        Left and [ SO₂Cl₂ ] decreases

            C.        Right and [ SO₂Cl₂ ] increases

            D.        Right and [ SO₂Cl₂ ] increases

15.        Consider the following equilibrium system: CO_2(g)   +  H_2(g)  ⇄  CO_(g)  +  H₂O_(g)

            Which of the following, when added to the system above, would result in a net decrease in [H₂O]?

            A. CO₂

            B. H₂

            C. CO

            D. H₂

16.         Consider the following equilibrium: C_(s)  +  2H_2(g)  ⇄ CH_4(g)  +  74 kJ

            When a small amount of solid C is added to the system

            A. [H₂] decreases

            B. [CH₄] increases

            C. The temperature increases

            D. All concentrations remain constant

17.         Consider the following equilibrium: 2NO_(g)  +  Cl_2(g)  ⇄  2NOCl_(g)

            At constant temperature and volume, Cl₂ is added to the above equilibrium   system. As equilibrium re-establishes, the

            A. [NOCl] will decrease

            B. The temperature increases

            C. [NO] will increase

            D. [NOCl] will increase