Which of the following statements is/are INCORRECT?   1. A system is defined as an object or collection of objects being studied.   2. Surroundings are defined as the entire universe, including the system.   3. In an endothermic reaction, heat is transferred from the system to the surroundings.

A flexible vessel contains 14.00 L of gas at a pressure of 1.27 atm. Under the conditions of constant temperature and constant number of moles of gas, what is the volume of the gas when the pressure of the vessel is decreased by a factor of two?

Which of the following is the cell notation for a voltaic cell based on the following reaction? Cu2+(aq) + Fe(s) → Cu(s) + Fe2+(aq)

Given the initial rate data for the reaction A + B → C, determine the correct rate expression for the reaction.   [A], M [B], M Δ[C]/Δt (initial) M/s   0.215 0.150 5.81 × 10–4   0.215 0.300 1.16 × 10–3   0.430 0.150 2.32 × 10–3

A 55.0 L gas cylinder contains 60.0 g helium (He) at 13 °C. What is the pressure (in atm) inside the cylinder? (R = 0.08206 L⋅atm/mol⋅K) (Report your answer to 1 decimal place, i.e. x.x) (No units are necessary in answer)

A hot piece of iron is dropped into a beaker containing colder water. Which of the following statements is/are CORRECT?1. Energy is transferred as heat from the iron to the water.2. Thermal equilibrium is attained when the iron and the water reach the same temperature.3. The water’s temperature will decrease in this experiment. 

What is the energy change (in J) when the temperature of [x] grams of Xenon (C = 1.03 J/g°C) is decreased from [y] °C to [z] °C (Report your answer to 2 decimal places, i.e. xx.xx and make sure to include a negative sign, if necessary.) (No units are necessary in answer.)

The total pressure of a mixture of 15.0 g of carbon tetrachloride gas and 23.5 g of oxygen gas is [x] mmHg.  Determine the partial pressure of oxygen gas in the mixture. (Report your answer in mmHg to nearest whole number, i.e. xxx) (No units are necessary in answer.)  

Determine the enthalpy change for the reaction below in kJ/mol-rxn, CaO(s) + CO2(g) → CaCO3(s) given the thermochemical equations below. Ca(OH)2(s) → CaO(s) + H2O(l) ΔH° = 65.2 kJ/mol-rxn Ca(OH)2(s) + CO2(g) → CaCO3(s) + H2O(l) ΔH° = −113.8 kJ/mol-rxn (Report your answer to the nearest whole number, i.e. xxx, with no decimal places.  Make sure to include a negative sign, if necessary.) (No units are necessary in answer.)

Find an equation for the line tangent to the graph of the given function at the indicated point.f(x) = x2 + 3 at (2, 7)