The graph represents the reaction 2H2 + 02 32H20 as it reaches equilibrium. Based on the graph, which two statements about this reaction
are true?
Concentration (mol/L)
le
-H₂O
Time (s)
A. The rate of formation of products is equal to the rate of formation
of reactants only after point 4
B. After point 2, the rate of formation of products is equal to the rate
of formation of reactants.
C. At point 2, the concentrations of H20, O2, and H2 are all changing
toward their equilibrium concentrations.
D. At point 1. more reactants are converted to products than
products are converted to reactants.

The passing of heat through a material while the material itself stays in place. a. radiation b. conduction c. convection

A2-kg bowling ball is 2.5 meters off the ground on a post when it falls. just before it reaches the ground, it is traveling 7 m/s. assuming that there is no air resistance, which statement is true?

Aheat engine running backward is called a refrigerator if its purpose is to extract heat from a cold reservoir. the same engine running backward is called a heat pump if its purpose is to exhaust warm air into the hot reservoir. heat pumps are widely used for home heating. you can think of a heat pump as a refrigerator that is cooling the already cold outdoors and, with its exhaust heat qh, warming the indoors. perhaps this seems a little silly, but consider the following. electricity can be directly used to heat a home by passing an electric current through a heating coil. this is a direct, 100% conversion of work to heat. that is, 19.0 \rm kw of electric power (generated by doing work at the rate 19.0 kj/s at the power plant) produces heat energy inside the home at a rate of 19.0 kj/s. suppose that the neighbor's home has a heat pump with a coefficient of performance of 4.00, a realistic value. note: with a refrigerator, "what you get" is heat removed. but with a heat pump, "what you get" is heat delivered. so the coefficient of performance of a heat pump is k=qh/win. an average price for electricity is about 40 mj per dollar. a furnace or heat pump will run typically 200 hours per month during the winter. what does one month's heating cost in the home with a 16.0 kw electric heater? what does one month's heating cost in the home of a neighbor who uses a heat pump to provide the same amount of heating?