This topic contains a solution. Click here to go to the answer

Author Question: A 12.8 g sample of ethanol (C2H5OH) is burned in a bomb calorimeter with a heat capacity of 5.65 kJ ... (Read 316 times)

yoroshambo

  • Hero Member
  • *****
  • Posts: 566

Question 1

The temperature rises from 25.00 °C to 29.00 °C when 3.50 g of sucrose undergoes combustion in a bomb calorimeter. Calculate ΔrU for the combustion of sucrose in kJ mol-1 sucrose. The heat capacity of the calorimeter is 4.90 kJ °C-1. The molar mass of sugar is 342.3 g mol-1.
◦ 1.92 × 103 kJ mol-1
◦ -1.23 × 103 kJ mol-1
◦ -1.92 × 103 kJ mol-1
◦ 2.35 × 104 kJ mol-1

Question 2

A 12.8 g sample of ethanol (C2H5OH) is burned in a bomb calorimeter with a heat capacity of 5.65 kJ °C-1. Using the information below, determine the final temperature of the calorimeter if the initial temperature is 25.0°C. The molar mass of ethanol is 46.07 g mol-1.

C2H5OH(l) + 3O2(g) → 2CO2(g) + 3H2O(g)DrU = -1235 kJ mol-1

◦ 74.2 °C
◦ 53.4 °C
◦ 28.1 °C
◦ 111 °C
◦ 85.7 °C


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by yoroshambo on Nov 18, 2019

Loise Hard

  • Sr. Member
  • ****
  • Posts: 340
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 25% of students answer this correctly




yoroshambo

  • Member
  • Posts: 566
Reply 2 on: Nov 18, 2019
Excellent


ebonylittles

  • Member
  • Posts: 318
Reply 3 on: Yesterday
Great answer, keep it coming :)

 

Did you know?

The National Institutes of Health have supported research into acupuncture. This has shown that acupuncture significantly reduced pain associated with osteoarthritis of the knee, when used as a complement to conventional therapies.

Did you know?

In the United States, congenital cytomegalovirus causes one child to become disabled almost every hour. CMV is the leading preventable viral cause of development disability in newborns. These disabilities include hearing or vision loss, and cerebral palsy.

Did you know?

If you could remove all of your skin, it would weigh up to 5 pounds.

Did you know?

Congestive heart failure is a serious disorder that carries a reduced life expectancy. Heart failure is usually a chronic illness, and it may worsen with infection or other physical stressors.

Did you know?

Coca-Cola originally used coca leaves and caffeine from the African kola nut. It was advertised as a therapeutic agent and "pickerupper." Eventually, its formulation was changed, and the coca leaves were removed because of the effects of regulation on cocaine-related products.

For a complete list of videos, visit our video library