Question: Ethanol (C2H5OH) melts a - 144 oC and boils at 78 C. The enthalpy of fusion of ethanol is 5.02 kj/mol, and its enthalpy of

Ethanol (C2H5OH) melts a - 144 oC and boils at 78 °C. The enthalpy of fusion of ethanol is 5.02 kj/mol, and its enthalpy of vaporization is 38.56 kj/mol. The specific heats of solid and liquid ethanol are 0.97j/g - k and 2.3 j/g - K, respectively.
(a) How much heat is required to convert 42.0 g of ethanol at 35 °C to the vapor phase at 78 °C?
(b) How much heat is required to convert the same amount of ethanol at - 155 oC to the vapor phase at 78 °C?

Step by Step Solution

★★★★★

3.35 Rating (170 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock

AnalyzePlan Follow the logic in Sample Exercise 113 Solve Physical data for ethanol C 2 H 5 ... View full answer

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Document Format (1 attachment)

876-C-P-c-L-A-S (237).docx

120 KBs Word File

Students Have Also Explored These Related Physical Chemistry Questions!

At 500 K in the presence of a copper surface, ethanol decomposes according to the equation C2H5OH(g) CH3CHO(g) + H2(g) The pressure of C2H5OH was measured as a function of time, and the following...

Ethanol (C2H5OH) has been proposed as an alternative fuel. Calculate the standard enthalpy of combustion per gram of liquid ethanol.

A sample of ethanol (ethyl alcohol), C2H5OH, contains 4.2 1023 hydrogen atoms. How many C2H5OH molecules are in this sample?

Ethanol (C 2 H 5 OH) melts at -114 o C and boils at 78 o C. The enthalpy of fusion of ethanol is 5.02 kJ/mol, and its enthalpy of vaporization is 38.56 kJ/mol. The specific heat capacity of solid and...

Ethanol (C2H5OH) melts at 114C and boils at 78C. The enthalpy of fusion of ethanol is 5.02 total heat required =q1+q2 =2.2kJ+17.2kJ kJ/mol, and its enthalpy of vaporization is 38.56 =19.4kJ kJ/mol....

How much heat is required to convert 34.0g of ethanol at 40C to the vapor phase at 78C ? Ethanol (C2H5OH) melts at 114C and boils Express your answer in kilojoules to three significant figures. at...

Ethanol (C 2 H 5 OH) melts at 159K and boils at 351K. The enthalpy of fusion is 5.02 kJ/mol and its enthalpy of vaporization is 38.56 KJ/mol. the specific heats of solids and liquid ethanol are 0.97...

find at least 3 errors in the given questions Intermolecular Forces, Phase Changes, and Solutions Solved Problems 1. One of the compounds shown here is a liquid at room temperature. Which one and...

Identify at least three errors in the given answers to the question, and explain how to correct the errors. 2. Ethanol (C2H5OH) melts at 114C and boils at 78C. The enthalpy of fusion of ethanol is...

Intermolecular Forces, Phase Changes, and Solutions Solved Problems (Extra Credit) At Attached is a pdf of solved problems that have a number of errors in them. For this assignment, please review the...

Peter Rourke, a loan processor at Wentworth Bank, has been timed performing four work elements, with the results shown in the following table. The allowances for tasks such as this are personal, 7%;...

Rich people often worry that others will seek to marry them only for their money. Is this a problem of adverse selection?

luxury goods D

Education. A social scientist would like to analyze the relationship between educational attainment (in years of higher education) and annual salary (in $1,000s). He collects data on 20 individuals....

Water in a 150-L closed, rigid tank is at 100C, 90% quality. The tank is then cooled to 10C. Calculate the heat transfer during the process.

A piston/cylinder contains 1 kg water at 20oC with volume 0.1 m3. By mistake someone locks the piston preventing it from moving while we heat the water to saturated vapor. Find the final temperature...

A test cylinder with constant volume of 0.1 L contains water at the critical point. It now cools down to room temperature of 20C. Calculate the heat transfer from the water.

The Robinson Corporation has $28 million of bonds outstanding that were issued at a coupon rate of 11.050 percent seven years ago. Interest rates have fallen to 10.550 percent. Mr. Brooks, the...

MA Cup, onurly has tre product, High-priced on MMA Cary has decided a new line of medium pred mowers. The building and machinery for producing this new in basinated to col 12.000.000 and it will be...

Due to erratic sales of its sole producta high-capacity battery for laptop computersPEM, Inc., has been experiencing financial difficulty for some time. The companys contribution format income...