Question

How much heat in kilojoules is evolved in converting 2.00 mol of steam at 150 ∘ C to ice at -45.0 ∘ C ? The heat capacity of steam is 1.84 J/ g ∘ C and that of ice is 2.09 J/ g ∘ C . Remember that if heat is leaving the system, then q is a negative number and if heat is entering the system, then q is a positive number

Answer 1

Steam Steam T= 373K a T=423K Liquid T=373KIO Tiee u lice & T= 228K T= 273K -Liquid/ S T = 273K The heat capacity of steam = 1.84 J/gee Liquid = 4.186J/ge lee = 2:091/ge Latent heat of condensation = 2260 4/8 meting = 3341/8

There are too moles of water (steam) = 189 steam. The change of heat in the system= 184J/g'ex189(373-423)K + (-2260 3/)*189 + 4.186J/g'e x 18gx (273-373)K + (-334J/g) x 18g + 2.093/grex (228K-273K)x18g = -1656) - 406803 - 7534,8J- 60121 - 1692.91 = - 57575.71 =-57.6 KJ 59.6kJ heat is evolved in converting, HO