1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
diamong [38]
3 years ago
9

A sample of food containing 27 g of fat, 48 g of carbohydrates and 20 g of protein is burned in a bomb calorimeter. In a perfect

world all of the energy from burning the food will be transferred from the food burning to the water in the calorimeter. Assuming no energy loss, what would be the final temperature of the water if you began with 23 L of water at 16 oC?
Chemistry
1 answer:
rosijanka [135]3 years ago
8 0

Answer:

38.3958 °C  

Explanation:

As,

1 gram of carbohydrates on burning gives 4 kilocalories  of energy

1 gram of protein on burning gives 4 kilocalories  of energy

1 gram of fat on burning gives 9 kilocalories of energy

Thus,

27 g of fat on burning gives 9*27 = 243 kilocalories of energy

20 g of protein on burning gives 4*20 = 80 kilocalories  of energy

48 gram of carbohydrates on burning gives 4*48 = 192 kilocalories  of energy

Total energy = 515 kilocalories

Using,

Q=m_{water}\times C_{water}\times (T_f-T_i)

Given: Volume of water = 23 L = 23×10⁻³ m³

Density=\frac{Mass}{Volume}  

Density of water= 1000 kg/m³

So, mass of the water:  

Mass\ of\ water=Density \times {Volume\ of\ water}  

Mass\ of\ water=1000 kg/m^3 \times {0.023\ m^3}  

Mass of water  = 23 kg

Initial temperature = 16°C  

Specific heat of water = 0.9998 kcal/kg°C  

515=23\times 0.9998\times (T_f-16)

Solving for final temperature as:

<u>Final temperature = 38.3958 °C  </u>

You might be interested in
Giovanni created this chart to study for an exam. Which best describes how to correct the error in the chart? Remove “plastics”
Vanyuwa [196]

Calcium carbonate when mixed with water result in the formation of Calcium hydroxide which is used as an antacid. The chloride ion also helps in the whitening of teeth thus finding its use as an ingredient in toothpaste.

Iron oxide is dark pigment which is naturally used in makeup.

<span>Therefore the answer to this question is Swap the uses for iron oxide and calcium carbonate. </span>

<span> </span>

5 0
3 years ago
Read 2 more answers
Susan made observations about outside events she noticed throughout the day. The day began with rain. Susan saw puddles on the r
S_A_V [24]

Answer:

Rainfall - precipitation

disappeared puddles - evaporation

cloud formation - condensation

Explanation:

Rainfall that is observed by the Susan is the precipitation of the water cycle in which the water vapor that was condensed become heavy and form droplets of water and fall from sky to the earth surface.

Puddles that formed due to rainfall are the collection of water in the water cycle which is evaporated (process: evaporation) into the atmosphere n the form of water vapor which condensed to form clouds.

4 0
3 years ago
How are the three isotopes of carbon the same ?
kondor19780726 [428]

Answer:

I'm srry

Explanation:

PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE don't yell at me I don't know

8 0
3 years ago
1. A block of plastic occupies a volume of 25.0 mL and weighs 20.5 g. What is its density? Circle or highlight
chubhunter [2.5K]
I think answer should be d. Please give me brainlest let me know if it’s correct or not okay thanks bye
4 0
2 years ago
If an atom has 11 atomic number and 11 neutrons how many electrons are there??
Fantom [35]

Answer:

11 electrons

Explanation:

The atomic number of sodium is 11. This tells us that sodium has 11 protons and because it is neutral it has 11 electrons. The mass number of an element tells us the number of protons AND neutrons in an atom (the two particles that have a measurable mass).

5 0
2 years ago
Other questions:
  • I WILL MARK BRAINLIEST
    12·1 answer
  • Which of the following distinguishes an element from all other elements?
    9·1 answer
  • What are three elements that have a higher boiling point than water
    11·1 answer
  • Define saturated solution. what happens as a saturated solution cools
    9·1 answer
  • The purpose of controlling an experiment is to _____. A. double-check your own work B. compare one theory to another theory C. p
    8·1 answer
  • What is definition of an abiotic factor?
    6·2 answers
  • How are earthquake seismograms utilized to locate the epicenter of an earthquake?
    11·1 answer
  • A box sits on a table. An arrow labeled F subscript N points up. An arrow labeled F subscript g points down. An arrow labeled F
    5·1 answer
  • Pls help me guys please please​ only 1 question choose
    7·1 answer
  • Are the “strings” of celery xylem or pholem tissue?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!