Author Question: How much heat is released when 85.0 g of steam at 100.0 C is cooled to ice at -15.0 C? The enthalpy ... (Read 66 times)

jazziefee · **on:** Jul 8, 2021

Question 1

For the reaction: CO(g) + 2 H₂(g) → CH₃OH(g)

K_p = 91.4 at 350 K and K_p = 2.05 × 10^-4 at 298 K.

What is the value of Δ_rH°?
◦ 49.9 kJ/mol
◦ 2.08 × 10³ kJ/mol
◦ 3.74 × 10^-2 kJ/mol
◦ 217 kJ/mol
◦ 446 kJ/mol

Question 2

How much heat is released when 85.0 g of steam at 100.0 °C is cooled to ice at -15.0 °C? The enthalpy of vaporization of water is 40.67 kJ mol^-1, the enthalpy of fusion for water is 6.01 kJ mol^-1, the molar heat capacity of liquid water is 75.4 J mol^-1°C^-1, and the molar heat capacity of ice is 36.4 J mol^-1°C^-1.
◦ 54.8 kJ
◦ 221 kJ
◦ 258 kJ
◦ 281 kJ

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

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