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
taurus [48]
3 years ago
15

a piece of food is burned in a calorimeter that contains 200.0g of water. If the temperature of the water rose from 65.0°C to 83

.0°C, how much heat energy in joules was contained in the food? Specific heat if water is 4.184 j/g°C.
Chemistry
1 answer:
Flauer [41]3 years ago
4 0

Answer: 15062.4 Joules

Explanation:

The quantity of heat energy (Q) required to heat a substance depends on its Mass (M), specific heat capacity (C) and change in temperature (Φ)

Thus, Q = MCΦ

Since,

Q = ?

Mass of food = 200.0g

C = 4.184 j/g°C

Φ = (Final temperature - Initial temperature)

= 83.0°C - 65.0°C = 18°C

Then, Q = MCΦ

Q = 200.0g x 4.184 j/g°C x 18°C

Q = 15062.4 J

Thus, 15062.4 joules of heat energy was contained in the food.

You might be interested in
How many grams of NH3 can be produced from 2.35 mol of N2 and excess H2.
tatyana61 [14]
Since the molar ratio of N2 to Nh3 is 2:1, you can make twice as much NH3 by using N2. Therefore, you can make a maximum of 4.5 mol of NH3 assuming 100% yield.
6 0
3 years ago
How do i convert decimals into scientific notation
zloy xaker [14]

Answer:

To convert a decimal into scientific notation, move the decimal point until you get to the left of the first non-zero integer. The number of places the decimal point moves is the power of the exponent, because each movement represents a "power of 10".

5 0
3 years ago
Why is it difficult to accurately predict leads most common isotope?
Hoochie [10]
Isotopes are the atoms of the same element with the difference in the number of neutrons. The number of electrons and protons are the same. The atomic masses are slightly different but the atomic number is the same. ... Therefore, it becomes difficult to exactly predict the common isotope of lead.
7 0
3 years ago
4. Why does the amount of heat released or absorbed in these processes change over time?
icang [17]

Answer:

aksisksiiskkssiososossozoozso

8 0
3 years ago
PLEASE HELP ASAP!!!
mamaluj [8]

Answer:The approximate atomic mass of lead is 207.24 amu.

Explanation:

Abundance of isotope (I) = 1.4% = 0.014

Atomic mass of the Isotope (I) = number protons +  number of neutrons = 82 + 122 = 204 amu

Abundance of isotope (II) = 22.1 % = 0.221

Atomic mass of the Isotope (II) = number protons +  number of neutrons = 82 + 125 = 207 amu

Abundance of isotope (III) = 24.1% = 0.241

Atomic mass of the Isotope (III) = number protons +  number of neutrons = 82 + 124 = 206 amu

Abundance of isotope (IV) = 52.4% = 0.524

Atomic mass of the Isotope (IV) = number protons +  number of neutrons = 82 + 126 = 208 amu

Average atomic mass of an element =

\sum(\text{atomic mass of an isotopes}\times (\text{fractional abundance)})

Average atomic mass of lead =

(204 amu\times 0.014+207 amu\times 0.221 amu+206\times 0.241+208 amu\times 0.524)=207.24 amu

The approximate atomic mass of lead is 207.24 amu.

7 0
3 years ago
Other questions:
  • Part a is the polar head of a soap molecule more attracted to calcium or sodium ions?
    8·1 answer
  • In which of the following is most of the water on earth held?
    13·1 answer
  • What do scientists who study the human microbiome hope to achieve?
    6·2 answers
  • Which of these is a TRUE statement? A) Sound travels through gases easier than liquids. B) Sound travels through solids easier t
    6·2 answers
  • Explain Gay-Lussac’s Law in terms of the kinetic-molecular theory.
    14·1 answer
  • __is a term that refers to the amount of space that a substance or an object takes up
    6·1 answer
  • Flourine is more reactive than chlorine . why ? with short reason. ​
    12·1 answer
  • Please help meee! Chemistry!
    8·2 answers
  • Solid added to liquid and the solid floats down to bottom of container physical or chemical change?
    9·1 answer
  • A water environment<br> Producers<br> Decomposer <br> Consumer <br> Aquatic <br> Terrestrial
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!