CHEM 230 Midterm: Exam 1 Study Guide (Page 1)

The quantam mber can have values from The total number of orbitals possible at the n2 energy level is I the ale of The quantam amber m can have values from The total umber of orbitals possible at the 2 sublevel is to The Pauli Exclusion Prisciple tells us that no two electrons in an atom can have the same four quantum numbers Enter ONE possible value for each quantum number of an electron in the crbital given. Orbital 2p values possible for mi 1s There are a total o values possible for m The Pauli Exclusien Principle tells us that no two elecos in an anom ean have the same Sour quantu sumbers. Enter ONE posuble value for each quantom mamber of an electrom in the orbital given 3p values possible for m 2p There are a total of values possible for m

provided to determine AH rxn for the following reaction: urf (klimol) CH4(g) + 3 Cl2(g) → CHCI3() + 3 HCI(g) airrxn-? A)-151 kJ B)33SkJ C) +662kJ D) +117kJ E)-217 kJ A) 4.1 atm B) 5.0 atm c) 6.4 atm D)1.1 atm E) 2.3 atm kg) of the copper sample if the specific heat capacity of copper is 0 CH4(g) 75 CHCI3() -134 HCI(g) -92 8) What pressure will 14.0 g of CO exert in a 3.5 L container at 75 C? 9) A sample of copper absorbs 43.6 kJ of heat, resulting in a temperature rise of 50.0°C, determine the mass (in .385 J/g C A) 226 kg B) 0.235 kg C)6.64 kg D) 119kg E)5.10 kg 10) Which of the following processes is exothermic? A) the ionization of a melting snow atom B) the breaking of a boiling of water bond C) the boiling of water D) the condensation of water E) All of the above processes are exothermic 11) Calculate the energy of the red light emitted by a neon atom with a wavelength of 703.2 nm. B)4.27 x 10-19J C) 2.34 x 10-19J D)6.45 x 10-19J E) 2.83 x 10-19J A)3.54 × 10-19J 12) Identify the color of a flame test for potassium D) yellow A) violet B) red C) white E) blue 13) Which of the following statements is TRUE? A) The emission spectrum of a particular element is always the same and can be used to identify the element. B) Part of the Bohr model proposed that electrons in the hydrogen atom are located in "stationary states" or particular orbits around the nucleus. C) The uncertainty principle states that we can never know both the exact location and speed of an electron. D) An orbital is the volume in which we are most likely to find an electron. E) All of the above are true. 14) Calculate the wavelength of an electron (m-9.11 x 10-28 g) moving at 3.66 × 106 m/s. A)1.99 x 10-10m B)5.03 x 10-10 m C) 1.81×10-10 m D)5.52 × 10-9 m E) 2.76 × 10-9 m 15) Which of the following quantum numbers describes the shape of an orbital? A) principal quantum number B) magnetic quantum number C) spin quantum number D) Schrödinger quantum number E) angular momentum quantum number 16) Determine the energy change associated with the transition from n = 2 to n-5 in the hydrogen atom. A)-218×10-19J B)+654 × 10-19 J C) +4.58 x 10-19 J D)-1.53 x 10-19 J E) +3.76 × 10-19J 17) If two electrons in the same atom have the same value of I, they are A) in the same sublevel, but not necessarily in the same level. me level, but different sublevel. C) in the same orbital. D) in different levels and in different shaped orbitals. E) none of the above.