10-27-09 - Heat Temperature q = (mass) (T sys ) ( C ) S p e...

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Unformatted text preview: Heat Temperature q = (mass) (T sys ) ( C ) S p e c i f i c H e a t C a p a c i t y H e a t t r a n s f e r r e d Phase Changes Phase Changes Phase Changes Phase Changes Solid H 2 O (ice). As heat is added, temperature rises (the ice gets warmer) Phase Changes Phase Changes Ice melting. Temperature is constant as heat is added. Phase Changes Phase Changes Liquid H 2 O (water). Temperature increases as heat is added. Phase Changes Phase Changes Water boiling. Temperature is constant as heat is added. Phase Changes Phase Changes Gaseous H 2 O (steam). Temperature increases as heat is added. Phase Changes Phase Changes Phase changes q = m H Phase Changes Phase Changes For melting H f = heat of fusion Phase Changes Phase Changes For boiling H v = heat of vaporization Phase Changes Phase Changes During temp increases q = m C T Example Example How much heat must be added to convert 100 g of liquid water at 20.0C completely to steam at 100C? H v = 2256 J/g ; C = 4.184 J/ (gK) A. 33.4 kJ B. 22.5 kJ C. 259 kJ D. 8368 J E. 122 kJ Right answer CLICKER question...
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This note was uploaded on 12/18/2009 for the course BIOL 101 taught by Professor Wormer during the Fall '08 term at Purdue University-West Lafayette.

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10-27-09 - Heat Temperature q = (mass) (T sys ) ( C ) S p e...

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