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Unformatted text preview: textbook). The bomb was immersed in 2.500 L of water and the reaction initiated. The water temperature rose from 20.00C to 23.55C. If the calorimeter (excluding the water) has a heat capacity of 403 J/K, what is the heat of combustion (q V ) per gram of the fuel? H1CH7: In compliance with conservation of energy, Einstein explained that in the photoelectric effect, the energy of a photon (h) absorbed by a metal is the sum of the work function (), the minimum energy needed to dislodge an electron from the metals surface, and the kinetic energy (E k ) of the electron: h = + E k . When light of wavelength 358.1 nm falls on the surface of potassium metal, the speed (u) of the dislodged electron is 6.40 x 10 5 m/s. (a) What is E k of the dislodged electron? Recall that E k = mu 2 . (b) What is (in J) of potassium?...
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- Fall '07