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
MrRissso [65]
3 years ago
11

How much heat is given off when 869 g iron bar cools from 94 degrees celsius to 5

Chemistry
1 answer:
melomori [17]3 years ago
4 0

Answer:

Heat given off was -34.34kJ

Explanation:

Mass of iron bar = 869g

Initial temperature (T1) = 94°C

Final temperature (T2) = 5°C

Specific heat capacity of iron (c) = 0.444J/g°C

Heat energy (Q) = Mc∇T

Q = heat energy

c = specific heat capacity

∇T = change in temperature

M = mass of the substance

Q = mc∇T

∇T = T2 - T1

Q = Mc(T2 -T1)

Q = 869 * 0.444 * (5 - 94)

Q = 385.836 * -89

Q = -34339.404J

Q = -34.34kJ

The heat given of was -34.34kJ

You might be interested in
How many aluminum atoms are in 1 mole of aluminum?
natulia [17]

Answer:

2 atoms of aluminium makes a molecule of aluminium

8 0
3 years ago
Which title is most appropriate for this table?
Anastasy [175]

a.uses of functional groups involving oxygen

4 0
3 years ago
Read 2 more answers
What is hypothesis please help
Mama L [17]
A hypothesis is how you think the experiment is going to end
5 0
3 years ago
Read 2 more answers
Which statement best describes the diagram please help
Gwar [14]

Answer:

The right statement is " the Pathway A-C-D involves a catalyst and is faster than A-B-D"

Explanation:

Catalyst is a substance that increases the rate of a chemical reaction by lowering the activation energy Eₐ (i.e. by changing the reaction pathway), which Catalyst is not consumed in the catalyzed reaction and can continue to act repeatedly.

From the attached figure one can see that the path way A-C-D has different pathway and lower activation energy (Eₐ) than the pathway A-B-D, this means that the pathway A-C-D is a catalyzed pathway and it is faster than A-B-D.

So, the right statement is " the Pathway A-C-D involves a catalyst and is faster than A-B-D"

3 0
3 years ago
Along the length of the DNA strand, information is stored in the sequence of __________.
Zolol [24]
In the sequence of nitrogenous bases
3 0
3 years ago
Other questions:
  • What mass of oxygen forms from 71.89 g CO2? Use the periodic table to find molar masses.
    7·1 answer
  • 6 Which substances have atoms of the same element but different molecular structures?
    10·1 answer
  • Which of the following is an anion?Al3+ Mg2+ O2– H Save
    11·1 answer
  • Forces that act between two molecules are referred to as intermolecular forces true or false
    15·1 answer
  • 1. What is the name of the covalent compound CCl4?2. What is the name of the covalent compound N2O5?
    10·2 answers
  • How many reactants are there?
    12·2 answers
  • Calculate the theoretical density (in g/cm3) of copper (Cu), given that it has the FCC structure. The atomic weight of Cu is 63.
    11·1 answer
  • What is the charge of this atom? <br> 65 protons <br> 60 electrons <br><br> A)-5<br> B)+5<br> C)0
    10·2 answers
  • 10 points. Please help.
    11·2 answers
  • The solar system is the collective name for the sun, eight planets, and their moons. The
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!