By Michael B McGinnis
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Example text
G)? 8) Practice 1.
The ¢H must also be multiplied by the same value. We want C(s) ϩ 2H2(g) S CH4(g). So, C1s2 ϩ O2 1g2 S CO2 1g2 2. 3 1 2 Free Energy Free energy (G) of a system relates the enthalpy (H), temperature in Kelvin (T), and entropy (S) of a system. A negative ⌬G means the process is spontaneous, and a positive ⌬G means the process is not spontaneous. , Ϫ ⌬G)? 8) Practice 1.
Pressure is the force that is exerted over a unit area. For example, the atmosphere exerts a pressure known as atmospheric pressure. The Earth’s atmosphere is a function of the location and the weather conditions, and it decreases with a higher altitude. The unit of pressure commonly used in chemistry is the atmosphere (atm). The standard atmosphere is 1 atm or a measurement of 760 millimeters of mercury (mm Hg or torr) on a manometer. Boyles’s, Charles’s, GayLussac’s, and Avogadro’s Laws Properties of gases that change are pressure (P), temperature (T), volume (V), and the number of moles (n).