Lecture5-C

# Lecture5-C - 1 1 Becky loses 1,400 g in a month How many...

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Unformatted text preview: 1 1. Becky loses 1,400 g in a month. How many pounds ( lb ) did she lose during that period? Basic guidelines: 1. T K = T ºC + 273 number in K > number in ºC . T K > T ºC T K T ºF T ºC 2. For positive numbers , the number in º F will always be larger than the number in º C No negative number for T K 3 . For moderate number of temperatures (from -40 º C to 301 º C ) , the order is T K > T ºF > T ºC the number in C : T ºF > T ºC (below – 40 ºC , the reverse occurs ) 1.8 ( T ºC ) + 32 250 °F ≠ 290 °C 3. Perform the following temperature conversions: (a) 0 K to ºF 2 Density “ relative heaviness ” - physical property . defined as as mass divided by volume . Density = Mass Volume units of g /mL or ( g /L for gases) For a pure material, this property is constant . Examples: carbon dioxide 0.00 198 g / mL liquid wate = 1 00 g mL Density : generally, solids > liquids >>> gases liquid water = 1.00 g /mL , ice = 0.92 g / mL ( an exception ) alcohol = 0.789 g / mL lead =...
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Lecture5-C - 1 1 Becky loses 1,400 g in a month How many...

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