Author Question: If 34 g of a solid with a molar mass = 174 g/mol requires 21.3 kJ to melt it, what is the molar heat ... (Read 41 times)

EY67 · **on:** Jul 8, 2021

Question 1

How much heat would be released by the condensation of 5.40 g of steam at 100 °C and the subsequent cooling of the water to 25 °C? [Δ_vapH = 40.7 kJ/mol at 100 °C; C_p for H₂O(l) is 4.18 J g^-1°C^-1]
◦ 12.2 kJ
◦ 12.8 kJ
◦ 13.9 kJ
◦ 18.3 kJ
◦ 23.7 kJ

Question 2

If 34 g of a solid with a molar mass = 174 g/mol requires 21.3 kJ to melt it, what is the molar heat of fusion in kJ/mol?
◦ (21.3)(174)(34) kJ/mol
◦ (21.3/174)(34) kJ/mol
◦ (21.3/174)/34 kJ/mol
◦ (21.3)(174/34) kJ/mol
◦ (34/21.3)(174) kJ/mol

aburgess · **Reply #1 on:** Jul 8, 2021

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