This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: Ethanol (C2H5OH) melts at -114 C. The enthalpy of fusion is 5.02 kJ/mol. The specific heats of ... (Read 52 times)

RYAN BANYAN

  • Hero Member
  • *****
  • Posts: 563
on: Aug 27, 2018
Ethanol (C2H5OH) melts at -114 C. The enthalpy of fusion is 5.02 kJ/mol.
 
  The specific heats of solid and liquid ethanol are 0.97 J/g-K and 2.3 J/g-K, respectively. How much heat (kJ) is needed to convert 25.0 g of solid ethanol at -135 C to liquid ethanol at -60 C?
  A) 207.3
  B) -13.3
  C) 6.34
  D) 3617
  E) 8.63

Question 2

The normal boiling point of methanol is 64.7 C and the molar enthalpy of vaporization if 71.8 kJ/mol. The value of S when 1.75 mol of CH3OH (l) vaporizes at 64.7 C is ________ J/K.
 
  A) 0.372
  B) 4.24  107
  C) 372
  D) 1.94  103
  E) 1.94
Chemistry: The Central Science ¦ Brown, LeMay, Bursten ¦ 14th Edition
Buy Test-Bank


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

al

  • Sr. Member
  • ****
  • Posts: 344
Reply #1 on: Aug 27, 2018
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
Answer Preview
Only 42% of students answer this correctly


RYAN BANYAN

  • Member
  • Posts: 563
Reply 2 on: Aug 27, 2018
Wow, this really help

jackie

  • Member
  • Posts: 324
Reply 3 on: Yesterday
Great answer, keep it coming :)

« previous next »
 

Did you know?

The use of salicylates dates back 2,500 years to Hippocrates’s recommendation of willow bark (from which a salicylate is derived) as an aid to the pains of childbirth. However, overdosage of salicylates can harm body fluids, electrolytes, the CNS, the GI tract, the ears, the lungs, the blood, the liver, and the kidneys and cause coma or death.

Did you know?

Although not all of the following muscle groups are commonly used, intramuscular injections may be given into the abdominals, biceps, calves, deltoids, gluteals, laterals, pectorals, quadriceps, trapezoids, and triceps.

Did you know?

The U.S. Preventive Services Task Force recommends that all women age 65 years of age or older should be screened with bone densitometry.

Did you know?

Approximately one in four people diagnosed with diabetes will develop foot problems. Of these, about one-third will require lower extremity amputation.

Did you know?

Malaria was not eliminated in the United States until 1951. The term eliminated means that no new cases arise in a country for 3 years.

Muscle fibers consist of single, elongated, multinucleated cells that arise from the fusion Muscle fibers consist of single, elongated, multinucleated cells that arise from the fusion
Potential applications of embryonic and tissue specific adult stem cell in cellular and gene theraph Potential applications of embryonic and tissue specific adult stem cell in cellular and gene theraph
Type II Tissue Specific Reactions Type II Tissue Specific Reactions
Selected Pediatric Drugs for Which Specific Indications and Dosage Guidelines Exist Selected Pediatric Drugs for Which Specific Indications and Dosage Guidelines Exist
Specific amino acid–nucleotide contacts for cI and Cro repressors Specific amino acid–nucleotide contacts for cI and Cro repressors
Ethanol has the molecular formula C2H6O. Which ball and stick model shown above represents ... Ethanol has the molecular formula C2H6O. Which ball and stick model shown above represents ...
Video: Junction Types - Tight and Adherens Junctions

For a complete list of videos, visit our video library