Which of the following constants is/are needed to calculate the amount of energy required to heat 12.0g of H₂O(l) at 30.0^$\circ$C to H₂O(l) at 85.0^$\circ$C
I. $\Delta$ H_fus (H₂O)
II. $\Delta$ H_vap (H₂O)
III. specific heat of H₂O(s)
IV. specific heat of H₂O(l)
V. specific heat of H₂O(g)

Question

Which of the following constants is/are needed to calculate the amount of energy required to heat 12.0g of H₂O(l) at 30.0^$\circ$C to H₂O(l) at 85.0^$\circ$C
I.

\Delta

H_fus (H₂O)
II.

\Delta

H_vap (H₂O)
III. specific heat of H₂O(s)
IV. specific heat of H₂O(l)
V. specific heat of H₂O(g)

Quizplus · Accepted Answer

IV onlyTo calculate the energy required to heat a substance from one temperature to another in the same phase, only the specific heat of the substance in that phase is needed. Since the substance remains in the liquid phase throughout the heating process, only the specific heat of the liquid phase is required.

Which of the Following Constants Is/are Needed to Calculate the Amount