Alkali metals (Group 1 elements in the periodic table) are known to be very reactive. Which statement accurately explains the reactivity of the alkali metals? A. Alkali metals have very low density, which makes them very reactive, because they want to gain energy and become stable.
B. Alkali metals are in Group 1 of the periodic table making them less reactive because the reactivity of a metal increases from left to right across each row.
С. Alkali metals are very reactive because they all are solids at room temperature.
D. Alkali metals are all in Group 1 of the periodic table making them very reactive because the reactivity of a metal increases from right to left across each row.

Steam is generated in a boiler of a cogeneration plant at 10 mpa and 450°c at a steady rate of 5 kg/s. in normal operation, steam expands in a turbine to a pressure of 0.5 mpa and is then routed to the process heater, where it supplies the process heat. steam leaves the process heater as a saturated liquid and is pumped to the boiler pressure. in this mode, no steam passes through a condenser, which operates at 20 kpa. (a) determine the power produced in the turbine and the rate at which process heat is supplied in this mode. (b) determine the power produced in the turbine and the rate of process heat supplied if only 60 percent of the steam is routed to the process heater and the remainder is expanded to the condenser pressure. (3.32 mw; 9.69 mw; 4.25 mw; 5.82 mw)