In the presence of excess oxygen, methane gas burns in a constant-pressure system to yield carbon dioxide and water

See attached file for full problem description. 1. In the presence of excess oxygen, methane gas burns in a constant-pressure system to yield carbon dioxide and water: Calculate the value of q (kJ) in this exothermic reaction when 1.70 g of methane is combusted at constant pressure. A. -94.6 B. 0.0306 C. -0.0106 D. 32.7 E. -9.46 × 104 2. Calculate the kinetic energy in joules of an automobile weighing 2135 lb and traveling at 55 mph. A. 1.2 × 104 B. 2.9 × 105 C. 5.9 × 105 D. 3.2 × 106 E. 3.2 × 10-6 3. The heat absorbed by a system at constant pressure is equal to E + PV. 4. Calculate H0 at 25C for the reaction below... click for more

What is the heat of combustion per gram of butane?

5. The combustion of butane produces heat according to the equation 2C4H10(g) + 13O2(g)  8CO2(g) + 10H2O(l) H° = -5,314 kJ What is the heat of combustion per gram of butane? A.–32.5 kJ/g B.–45.7 kJ/g C.–91.5 kJ/g D.–2,656 kJ/g E.–15,440 kJ/g 6. The freezing of water is an example of an exothermic change. 7. Calcium oxide and water react in an exothermic reaction. CaO(s) + H2O(l)  Ca(OH)2(s) H° = –64.8 kJ/mol How much heat would be liberated when 7.15 g CaO(s) is dropped into a beaker containing 152 g H2O? A.1.97 x 10–2 kJ B.8.26 kJ C.508 kJ D.547 kJ E.555 kJ 8. How much heat is absorbed in the complete reaction of 3.00... click for more

The thermochemical standard state of a substance is its most stable state under one atmosphere

16. Which of the following statements is incorrect? A.The thermo chemical standard state of a substance is its most stable state under one atmosphere pressure and at some specific temperature (298 K if not specified) B.A superscript zero, such as H0, indicates a specified temperature of 0C. C.For a pure substance in the liquid or solid phase, the standard state is the pure liquid or solid. D.For a pure gas, the standard state is the gas at a pressure of one atmosphere. E. For a substance in solution, the standard state refers to one-molar concentration. 17. Fuel values of hydrocarbons increase as the H/C atomic ratio increases. Which of the following compounds h... click for more

Which response includes all of the following substances that have H = 0

See attached file for full problem description. 13. Which response includes all of the following substances that have H = 0, and no other substances? I. HCl(g) II. Na(s) III. HCl(aq) IV. F2(g) A.I and II B. II and IV C.I, II, and IV D.II E.I, II, III, and IV 14. Renewable energy sources are essentially inexhaustible. 15. Given the following reactions is __________ kJ. A.-395.62 B.-527.65 C.439.63 D.571.66 E.527.65

Lewis structure

3. Draw the lewis structure for: CLNO ONF3 XeF2 OXeF2 HO2CCO2H 4. Which of the following compounds/ions contains a bond angle of 120 degrees? A. CH3Cl B. Ch2Cl2 C. CH3OH D. CO3 2- (ion) E. CO2