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
Min : sec helium and nickel are classified as _____, which are pure substances that make up all kinds of matter
Sidana [21]

Helium which has a chemical formula of He is considered as a noble gas while Nickel which has a chemical formula of Ni is considered as metallic. Although both have different phases but they are both classified under the general category of “Elements”.

 

answer:

<span>elements</span>

4 0
3 years ago
Photosynthesis is the process by which most living things convert the chemical energy in glucose into more accessible chemical e
kotykmax [81]
The correct answer is A
3 0
3 years ago
When energy is transferred to ocean water from moving air above it what happens to most of the energy
Free_Kalibri [48]

c trust me i did the test

3 0
3 years ago
1. What three types of atoms are in a glucose molecule?
Svetach [21]

Answer:

Carbohydrates,Monosaccharides,and disaccharides

Explanation: I'm good at science

3 0
3 years ago
You want to determine the concentration of a solid solute dissolved in a specified volume of liquid solvent which of the followi
Natali [406]
Generally, chemists prefer to use morality (B) because it only invovles measuring the final volume of the solution and amount of moles of the solute

Hope this helps
6 0
3 years ago
Read 2 more answers
Other questions:
  • How does molecular size affect solubility
    6·1 answer
  • Why are teeth not minerals?
    11·2 answers
  • What is the name of the high energy compound that cells use directly to fuel other chemical reactions?
    7·1 answer
  • After 41.0 min, 41.0% of a compound has decomposed. what is the half-life of this reaction assuming first-order kinetics?
    6·1 answer
  • What does the kinetic molecular theory explain?
    6·2 answers
  • I just randomly remembered my 9 year old sister telling my 14 year old crush that he looks like and elf... she goes "You're like
    5·2 answers
  • A sample of iron (III) chloride has a mass of 26.29g. How many moles would this be?
    8·1 answer
  • Scientific knowledge results from the interaction of scientists who are investigating natural phenomena. Which of these BEST des
    13·1 answer
  • In coca cola the ingridents are : CARBONATED WATER.
    9·1 answer
  • Why is copper used to make hot water tanks not steel.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!