How much energy is required to change a 30-g ice cube from ice at -25°C to steam at 130°C? 3.07 X Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. MJ

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Part A Calculate w for the adiabatic expansion of 3.35 mol of an ideal gas at an initial pressure of 1.50 bar from an initial temperature of 430. K to a final temperature of 310. K. Assume that Cp m = 5R/2. Express the work to three significant figures and include the appropriate units. w = 4595.6 J Submit Previous Answers Request Answer X Incorrect; Try Again; 4 attempts remaining Part B Choose an expression for the work done in the isothermal reversible expansion of the gas at 310. K from an initial pressure of 1.50 bar O Wrev = -nCp,m (Pt – Pt) O Wrev =R(P – R) O Wrev = -n(P – P)AT nRTln Wrev = Submit Request Answer

For an ideal gas Cy and Cp are different because of the work W associated with the volume change for a constant-pressure process. To explore the difference between Cy and Cp for a liquid or a solid, consider the process in which 5.00 mol of ethanol is warmed from 10.0°C to 60.0° C while the applied pressure remains a constant 1.00 atm. The molar mass of ethanol is M = 46.1 g/mol, and the coefficient of volume expansion is 110 x 10-5 K-¹.