Grade 12General Physics
How much energy does it take to melt ice? How much does it cost?
How much energy does it take to melt ice? How much does it cost?
1 Answer
Neer Varshney
Find the molecular mass of water: H20 --> 2*1.008 + 16.00 = 18.016 g/mol
Find how many moles of water molecules you have in 16.87 g of ice:
16.87 g H2O (1 mole H2O/ 18.016 g H2O) = 0.936 moles of H2O
Melting ice is a an endothermic process so the ΔH will be positive.
Just use dimensional analysis to find the answer: E = 6.02 kJ/mol (0.936 moles H2O) = 5.64 kJ of energy.
And about the cost, why would anyone would like to melt ice?? u can simply use water for free :P
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