Problem set

Please see the attached file for full problem description. --- 2. Which half-reactions represent oxidation and which reduction? Explain your reasoning. 2+ - a. Fe  Fe + 2 e 4+ _ 2+ b. Ni + 2 e  Ni - - c. 2 H O + 2 e  H + 2 OH 2 2 4. Explain the difference between a rechargeable battery and one that must be discarded. Contrast a NiCad battery with an alkaline battery in your explanation. 7. Two common units associated with electricity are volts and amps. What does each unit measure? 14. What is the difference between a storage batte... click for more

Thermodynamics

Use thermodynamic data to calculate the standard enthalpy of decomposition of liquid hydrogen peroxide into water and oxygen gas: H2O2(l)-->H2O(g) + 1/2 O2(g). Calculate the energy released by the decomposition of 1.0 g of 90% hydrogen peroxide solution. Molar mass of hydrogen peroxide = 34.0 g/mol. Estimate the final temperature of the product gases of the decomposition. Assume that the constant-volume heat capacities of water and oxygen are respectively 35, and 25 J/mol/K. enthalpy of H2O2(l) = -187.8 kJ/mol enthalpy of H20(g) = -241.8 kJ/mol enthalpy of O2(g) = 0 kJ/mol

Equilibrium Constants

The equilibrium dissociation constant, K(subscript p), of the reaction H2-->2H/H2<--2H is 3.6 x 10^-33 atm. 1.00 mol of H2 is injected into a 10.5-L oven at 600 K and allowed to reach equilibrium. Calculate the total number of free hydrogen atoms in the reaction system.

Problem Set

Please see the attached file for full problem description. --- 10. The figure below shows a somewhat condensed structural formula for acetaminophen, the active ingredient in Tylenol. CH CONH --- (a pentagon) ---- OH 3 a. Write the complex structural formula for acetaminophen, showing all atoms and all bonds. b. What is the molecular formula for this compound? c. Children’s Tylenol is a flavored aqueous solution of acetaminophen. Predict what part or parts of the molecule make acetaminophen dissolve in water. 19. Sulfanilamide is the simplest of antibiotics known as sulfa drugs. It appears to act against bacteria by replacing para-aminobenzoic acid, an essential nutrient... click for more

how many cal of heat will be released?

If 75 grams of steam at +140C is cooled to the point that it becomes ice at -5C, how many calories of heat will be released? (*The specific heats of steam and ice are both 0.5 cal/gC.) please show how you got it thanks