Chemistry

Energy, Heat, and Work • You can think of energy as a quantity an object can possess or as a collection of objects. • You can think of heat and work as the two different ways that an object can exchange energy with other objects. • Either out of it, or into it The internal energy ( E ) of a system is the sum of the kinetic and potential energies of all the particles in the s

C117_Chapter_9_2_Jan_22_2021.pdf-Energy, Heat, and Work • You

Linear Shape Charge cloud geometry Trigonal bipyramidal Molecular shape Linear Five charge clouds: Three lone pairs Expanded Octets Trigonal bipyramidal Seesaw T-shaped Linear Expanded Octets Six charge clouds Octahedral Square pyramidal Square planar All atoms are equivalent in octahedron Square Pyramidal Shape Charge cloud geometry Octahedra

C117_Chapter_8_2_Mar_3_2021.pdf-Linear Shape Charge cloud geometry Trigonal

Robinson, McMurry, Fay 8 th Edition Principles of Chemistry & Biochemistry I Chapter 9 – Lecture 6 (Feb 1, 2021) Thermochemistry: Chemical Energy Δ H f o for some Compounds Compound Δ H f °, kJ/mol CaO(s) calcium oxide − 634.9 C(s) diamond 1.88 CH 4 (g) methane − 74.6 C 2 H 2 (g) acetylene + 227.4 C 2 H 4 (g) ethylene + 52.4 C 2 H 6 (g) ethane − 84.68 C 2 H 5 OH( ℓ ) ethanol − 277

C117_Chapter_9_6_Feb_1_2021.pdf-Robinson, McMurry, Fay 8 th Edition

Wavelength,  Distance between crests. Length units (m, cm, nm) Amplitude Amplitude is the height of the wave Frequency,  Number of crests passing a point per unit time. Inverse time units. 1 hertz (Hz) = 1 s − 1 Classical wave propagation • Velocity of the wave = frequency × wavelength =  • Energy of a classical wave depends on the amplitude of the waves and the

C117_Chapter_5_1_Feb_3_2021.pdf-Wavelength,  Distance between crests. Length

C103 Introduction to Chemical Principles Fall 2020 2 following sections of Canvas: • The ‘Home’ page – course introduction and basic information. • ‘Modules’ – all lecture notes and videos, practice questions/exams and discussion resources, plus other useful information. • The ‘Announcements’ page – important messages. • The ’etext’ – online textboo

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