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
notka56 [123]
3 years ago
14

Show the calculation of the final temperature for a 20.8 gram piece of iron heated to 100oC which has been added to a 55.3 gram

sample of water at 25.3oC in a coffee cup calorimeter.
c (water) = 4.184 J/g oC; c (Fe) = 0.449 J/g oC
Chemistry
1 answer:
GrogVix [38]3 years ago
5 0

Answer:

Final Temperature = 28.2 oC

Explanation:

Information given;

Mass of Iron = 20.8g

Initial Temperature of Iron = 100C

Mass of water = 55.3g

Initial temperature of water = 25.3 C

The presence of a coffee cup calorimeter hints that there is no heat loss to the surrounding and that the iron and water are at thermal equilibrium.

Thermal equilibrium means that there is no heat transfer going on between the bodies, which simply means that the bodies are at the same temperature.

Hence, both bodies would the same final temperature (T2)

H = M * C * ΔT (For iron)

H = 20.8 * 0.449 * ( 100 - T2)

H = 9.3392 ( 100 - T2)

H = 933.92 - 9.3392T2

H = M * C * ΔT (For water)

H = 55.3 * 4.184 * (T2 - 25.3)

H = 231.3752 (T2 - 25.3)

H = 231.3752T2 - 5853.79

Since they are in thermal equilibrium it means H (Iron) = H (water).

This leads to;

933.92 - 9.3392T2 = 231.3752T2 - 5853.79

231.3752T2 +  9.3392T2  = 5853.79 + 933.92

240.7144 T2 = 6787.71

T2 = 28.2 oC

You might be interested in
What product(s) are formed during the complete combustion reaction that occurs when methane (CH4) and molecular oxygen (O2) reac
Vilka [71]

Answer: CO2 and H2O

Explanation: I already took the test it's right

3 0
3 years ago
What is the IUPAC name for the compound FeS?
densk [106]
The correct answer is option 3. The IUPAC name is Iron(II) sulfide. It is the less stable amorphous form.  When this is powdered, it is pyrophoric or it ignites spontaneously in air. It readily reacts with hydrochloric acid producing hydrogen sulfide.
5 0
3 years ago
Balance the equation ____Mg+_____HNO3=____Mg(NO3)2+H2
Arturiano [62]

Explanation:

2Mg⁺ 2HNO₃ = Mg(NO₃)₂ + H₂

7 0
2 years ago
Element Y has two natural isotopes Y-63 (62.940 amu) and Y-65 (64.928 amu). Calculate the atomic mass of element Y, given the ab
djverab [1.8K]

Answer:

Average atomic mass = 63.553 amu.

Explanation:

Given data:

Abundance of Y-63 = 69.17%

Abundance of Y-65 = 100 - 69.17 = 30.83%

Atomic mass of Y-63 = 62.940 amu

Atomic mass of Y-65 = 64.928 amu

Atomic mass of Y = ?

Solution:

Average atomic mass= (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass)  / 100

Average atomic mass= (62.940×69.17)+(64.928×30.83) /100

Average atomic mass =  4353.560 + 2001.730 / 100

Average atomic mass = 6355.29 / 100

Average atomic mass = 63.553 amu.

5 0
3 years ago
What is Aurora Borealis?​
Leona [35]

Auroras present in polar regions.

8 0
2 years ago
Read 2 more answers
Other questions:
  • What is the change in enthalpy for the single replacement reaction between solid zinc and Cs2SO4 in solution to produce cesium a
    7·1 answer
  • A chemist forms 16.6 g of potassium iodide by combining 3.9 g of potassium with 12.7 g of iodine. Show that these results are co
    10·1 answer
  • An atom of boron has an atomic number of 5 and an atomic mass of 11. The atom contains (2 points)
    5·1 answer
  • When an ice cube melts what happens to the matter that once made up the cube
    12·1 answer
  • Copper(i) ions in aqueous solution react with nh3(aq) according to
    9·1 answer
  • The next level of organization is the _____.
    9·1 answer
  • You read a primary source and a secondary source that discuss the same
    7·2 answers
  • What volume of hydrogen is necessary to react with 6.25g of nitrogen to produce ammonia?
    8·2 answers
  • What are the noble gases
    6·2 answers
  • how many bonding pairs and nonbonding pairs of electrons does each nitrogen atom contain?bonding pairs of electrons for nitrogen
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!