QUESTION IMAGE
Question
aplicación del razonamiento sobre el flujo de calor
el calor de vaporización del agua es. ¿cuánta energía térmica deben de agua para evaporarse completamente? use la fórmula 40.7 kj/mol 150.0 g? = nδh
6,105 kj
610.5 kj
381.6 kj
339.2 kj
Step1: Calculate the number of moles of water
The molar mass of water ($H_2O$) is $M=(2\times1 + 16)=18\ g/mol$. Given the mass of water $m = 150.0\ g$. The number of moles $n=\frac{m}{M}=\frac{150.0\ g}{18\ g/mol}\approx8.333\ mol$.
Step2: Calculate the thermal energy
The heat of vaporization of water is $\Delta H = 40.7\ kJ/mol$. Using the formula $Q=n\Delta H$, we substitute $n = 8.333\ mol$ and $\Delta H=40.7\ kJ/mol$. So $Q=8.333\ mol\times40.7\ kJ/mol = 339.2\ kJ$.
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$339.2\ kJ$