enthalpy and phase changes\nquiz complete\n1 2 3 4 5 6 7 8 9 10\ntime remai\n58:5\nan engineer wants to…

enthalpy and phase changes\nquiz complete\n1 2 3 4 5 6 7 8 9 10\ntime remai\n58:5\nan engineer wants to determine an efficient method for condensing large amounts of steam into liquid water. which constant should she use?\n○ $\\delta h_{fus}$\n○ $-\\delta h_{vap}$\n○ $\\delta h_{vap}$\n○ $-\\delta h_{fus}$

enthalpy and phase changes\nquiz complete\n1 2 3 4 5 6 7 8 9 10\ntime remai\n58:5\nan engineer wants to determine an efficient method for condensing large amounts of steam into liquid water. which constant should she use?\n○ $\\delta h_{fus}$\n○ $-\\delta h_{vap}$\n○ $\\delta h_{vap}$\n○ $-\\delta h_{fus}$

Answer

Brief Explanations:

Condensation is the reverse process of vaporization (liquid to gas). The enthalpy of vaporization ($\Delta H_{vap}$) is the energy absorbed for vaporization; condensation releases this energy, so we use the negative value of $\Delta H_{vap}$. $\Delta H_{fus}$ relates to solid-liquid phase changes, which is irrelevant here.

Answer:

  • $\Delta H_{vap}$