Classify each function as a path function or a state function. Path function State function Answer Bank distance traveled work heat enthalpy energy

Starting with equation 2.27 andthe original definitionof enthalpy, derive the fact that Cp-=Cv-+R

When ethanol (grain alcohol, is burned in oxygen, approximately 1360 kJ of heat energy is released per mole of ethanol. mg src=Images/HTML_99425-10-44QAP_image002.jpg alt="" align="top"/> What quantity of heat is released for each gram of ethanol burned? i>What is for the reaction as written? How much heat is released when sufficient ethanol is burned so as to produce 1 mole of water vapor?

9.102 A runner generates 418 kJ of energy per kilometer from the cellular oxidation of food. The runner's body must dissipate this heat or the body will overheat. Suppose that sweat evaporation is the only important cooling mechanism. If you estimate the enthalpy of evaporation of water as 44 kJ/mol and assume that sweat can he treated as water, describe how you would estimate the volume of sweat that would have to be evaporated if the runner runs a 10-km race.

Equal masses of liquid A, initially at 100C, and liquid B, initially at 50C, are combined in an insulated container. The final temperature of the mixture is 80C. All the heat flow occurs between the two liquids. The two liquids do not react with each other. Is the specific heat of liquid A larger than, equal to, or smaller than the specific heat of liquid B?

How many mL of water at 10C (2 significant figures) must be added to 75 mL of water at 35C to obtain a final temperature of 19C? (Make the same assumptions as in Question 9.)

9.87 What will be the final temperature of a mixture made from equal masses of the following: water at 25.0 C, ethanol at 35.5 C, and iron at 95.0 C?

Difference between the system and the surroundings. Give examples of both.

On complete combustion at constant pressure, a 1.00-L sample of a gaseous mixture at 0C and 1.00 atm (STP) evolves 75.65 kJ of heat. If the gas is a mixture of ethane (C2H6) and propane (C3H8), what is the mole fraction of ethane in the mixture?

A piston performs work of 210. L atm on the surroundings, while the cylinder in which it is placed expands from 10. L to 25 L. At the same time, 45 J of heat is transferred from the surroundings to the system. Against what pressure was the piston working?