Unformatted text preview: Δ ngas = 1 – 1 = 0 d) C(graph) + 2 H2(g) à༎ CH4(g) Δ ngas = 1 – 2 =  1 e) C(graph) + 2 H2(g) + 1/2 O2(g) à༎ CH3OH(l) Δ ngas = 0 – ½  2 =  2.5 f) C(graph) + 2 Br2(l) à༎ CBr4(l) Δ ngas = 0 – 0 = 0 Question 2: (5 points) Given that P=pressure, ρ=density, Vm=molar volume, V=volume, T=temperature, U=internal energy, n=number of moles, consider whether the six following quantities are extensive or intensive. P/(ρT) (VT)/(Vm) (nT)/(PVm) PV/RT ΔU/ΔT (1/V) (∂V/∂T)P Which of the following statement is true regarding this list of six quantities? In the above list, all quantities except V, the volume, and U, the internal energy, are intensive. Extensive properties are proportional to the amount of material, while intensive properties are independent of the amount of material. Hence, the ratio of two extensive properties is intensive while the product of an intensive property by an extensive property by an intensive property is extensive. The product or the ration of two intensive properties is intensive. This implies the following: P/(ρT) Intensive (VT)/(Vm) Extensive (nT)/(PVm) Extensive PV/RT Extensive ΔU/ΔT Extensive (1/V) (∂V/∂T)P Intensive Hence, there are two intensive properties and four extensive properties. Choice “b” is correct. a) There are five extensive quantities and one intensive quantity b) There are four extensive quantities and two intensive quantities c) There are the same numbers of extensive quantities and intensive quantities d) There are four intensive q...
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 Spring '07
 AREsker
 Physical chemistry, Thermodynamics, pH

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