1) A 75.0 g piece of metallic Ag is heated to 80 ° C and then thrown into a container with 50.00 mL ofwater at 23.2 ° C. The final temperature of the Ag mixture with water is 27.6 ° C. What is the specific heat of the metal?Heat of reaction2) A 0.205 g KOH nugget is mixed with 55.9 g of water in a foam coffee cup. The temperature increasesfrom 23.5 to 24.4 ° C. Assuming that the specific heat of dilute KOH is the same as that of water, what is the heat of theKOH solution in kCal / mol KOH?Calorimetry3) A coffee cup calorimeter contains 100.00 mL of 0.300 M HCl at 20.3 ° C. When 1.82 g of Zn are added, thetemperature increases to 30.5 ° C. What is the heat of the reaction in kJ per mole of Zn if we assume that there is no loss ofheat with the H2 (g) that escapes? ZZZZ (s) 2 HH (ac) → ZZnn2 (ac) HH2 (g)First Law of Thermodynamics4) What is the change in ∆E of a system, if from the system, 280 cal of heat emanate and it has 1.25 kJ of work already done?Formation enthalpies5) The ∆H0rxn of the complete combustion of pentane C5H12 (l), is -3509 kj / mol. Using the data in Appendix IIB, calculate the0H0rxn for the following reaction in which pentane also participates: 5 CO (g) 11 H2 (g) → C5H12 (l) 5 H2O (l) (Hint:calculate the 5Hff of C5H12 (l) from its combustion).Formation enthalpies (Use data from Appendix IIB)6) The decomposition of limestone, CaCO3 (ss), into lime CaO (s), and CO2 (g) is carried out in a gas furnace. Use thedates from Appendix IIB to determine how much heat is required to decompose 1.35 X 10 ^ 3 kg CaCO3 (s). Assume that theHeat of the reaction is the same as at 25 ° C and at 1 atm.
Reaction #1 A(g) B(g) —
Question Reaction #1 A(g) B(g) —
Given the following information: Cathode Reaction and Standard Potential, Eo
Question Given the following information: Cathode Reaction and Standard Potential, Eo X (aq) e- ↔ X(s) 2.55Z2(g) 2e- ↔ 2Z-(aq) 2.20Q5 (aq) e- ↔ Q4 (aq) -0.65Q4 (aq) 4e- ↔ Q(s) 1.43JO3-(aq) 4H (aq) 3e- ↔ JO(g) 2H2O(l) 1.70What is the standard cell potential for the following reaction, in V?Z2(g) 2X(s) ↔ 2X (aq) 2Z-(aq)
A battery consists of an Au/Au3 electrode (Eo = 1.50 V) and a Cu/Cu2
Question A battery consists of an Au/Au3 electrode (Eo = 1.50 V) and a Cu/Cu2 electrode (Eo = 0.34 V). Calculate the potential of the cell (Ecell) at 25 degrees C if the concentration of the Au3 solution is 0.0050 M and the concentration of the Cu2 solution is 1.2 M.
Consider the reaction:
A → B
The rate of the reaction
Question Consider the reaction:
A → B
The rate of the reaction is 1.6 × 10−2 M/s when the concentration of A is 0.35 M. Calculate the rate constant if the reaction is first order in A. Use only the numerical value for the rate constantI solved this by 1.6 x 10^-2/0.35 and got 0.0457 but I guess this is incorrect any help will be appreciated. Thanks.
1: What is the density of a liquid that has a volume of 15.6
Question Question 1: What is the density of a liquid that has a volume of 15.6 mL and a mass of 362 grams? a. 0.232 g/cm3b. 23.2 g/cm3c. 0.0431 g/cm3d. 43.1 g/cm3Question 2: When a gaseous sample experience a decrease in temperature at constant pressure, which of the following is a correct description of what should occur?a. The mass of the sample will remain constant.b. The volume occupied by the sample will decrease.c. The density of the sample will increase.d. All of the above will occur.e. None of the above will occur.Question 3: The particles that make up a type of matter where they are close together and cannot migrate with respect to each other acquire sufficient energy to begin to move with respect to each other but remain close together. This process is best described by which of the following?a. evaporation, a chemical processb. evaporation, a physical processc. melting, a chemical processd. melting, a physical processQuestion 4: When a gaseous sample experience a decrease in temperature at constant pressure, which of the following is a correct description of what should occur?a. The mass of the sample will remain constant.b. The volume occupied by the sample will decrease.c. The density of the sample will increase.d. All of the above will occur.e. None of the above will occur.Question 5: Which of the following correctly describes chemical compounds? (Select all answers that apply.)a. A chemical compound is a physical combination of two or more elements.b. A chemical compound can be represented by a chemical formula using elemental symbols and subscripts indicating the number of atoms of each element.c. A chemical compound always has the same ratio by mass of elements present no matter what the source of the compound.
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