methanol (ch₃oh) has a heat of fusion of 3.16 kj/mol. what is the heat of solidification that occurs when 64…

methanol (ch₃oh) has a heat of fusion of 3.16 kj/mol. what is the heat of solidification that occurs when 64 grams of liquid methanol freezes? -199 kj -6.32 kj 6.32 kj 199 kj

methanol (ch₃oh) has a heat of fusion of 3.16 kj/mol. what is the heat of solidification that occurs when 64 grams of liquid methanol freezes? -199 kj -6.32 kj 6.32 kj 199 kj

Answer

Explanation:

Step1: Calculate molar mass of methanol

The molar mass of $CH_3OH$: $12 + 4\times1+16 = 32$ g/mol.

Step2: Calculate number of moles

Number of moles $n=\frac{m}{M}$, where $m = 64$ g and $M = 32$ g/mol. So $n=\frac{64}{32}=2$ mol.

Step3: Calculate heat of solidification

Heat of solidification $q=-n\times\Delta H_{fus}$, $\Delta H_{fus}=3.16$ kJ/mol, $n = 2$ mol. So $q=-2\times3.16=-6.32$ kJ.

Answer:

-6.32 kJ