Calculate the enthalpy change when 1 kg ice melts. AHfusion = 6.009 kJ/mol 18. a. 111...

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Question

Answer 1

Answer #1

18)

Molar mass of H2O,

MM = 2*MM(H) + 1*MM(O)

= 2*1.008 + 1*16.0

= 18.016 g/mol

mass(H2O)= 1 Kg

= 1000.0 g

use:

number of mol of H2O,

n = mass of H2O/molar mass of H2O

=(1*10^3 g)/(18.02 g/mol)

= 55.51 mol

Now use:

Q = number of mol * delta H

= 55.51 mol * 6.009 KJ/mol

= 334 KJ

Answer: c

Only 1 question at a time please

Answer 2

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