what is the amount of heat released when 94g of water at 80 degrees Celsius to...

Question

Question

what is the amount of heat released when 94g of water at 80 degrees Celsius to form ice at -30 degrees Celsius

Answer 1

Answer #1

no of moles of H2O = W/G.M.Wt

= 94/18 = 5.22moles

q1 = 94*4.18*(80-0) = 31433.6J = 31.4336KJ

q2 = n*H fus

= 5.22mole*6.01KJ/mole = 31.37KJ

q3 = mcT

= 94*2.09*30 = 5893.8J = 5.8938KJ

total heat release q = q1 + q2 + q3

= 31.4336+31.37+5.8938 = 68.7KJ

Answer 2

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