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
Firlakuza [10]
3 years ago
8

Calculate the DH°rxn for the decomposition of calcium carbonate to calcium oxide and carbon dioxide. DH°f means delta or change

of heat of formation DH°f [CaCO3(s)] = –1206.9 kJ/mol; DH°f [CaO(s)] = –635.1 kJ/mol; DH°f [CO2(g)] = –393.5 kJ/mol CaCO3(s) --> CaO(s) + CO2(g)
Chemistry
1 answer:
USPshnik [31]3 years ago
5 0

Answer: +178.3 kJ

Explanation:

The chemical equation  follows:

CaCO_3(s)\rightarrow CaO(s)+CO_2(g)

The equation for the enthalpy change of the above reaction is:

\Delta H^o_{rxn}=[(1\times \Delta H^o_f_{(CaO(s))})+(1\times \Delta H^0f_{CO_2}]-[(1\times \Delta H^o_f_{(CaCO_3(s))})]

We are given:

\Delta H^o_f_{(CaO(s))}=-635.1kJ/mol\\\Delta H^o_f_{(CaCO_3(s))}=-1206.9kJ/mol\\\Delta H^o_f_{(CO_2(g))}=-393.5kJ/mol\\\Delta H^o_{rxn}=?

Putting values in above equation, we get:

\Delta H^o_{rxn}=[(1\times (-635.1))+(1\times (-393.5))]-[(1\times (-1206.9))]

The DH°rxn for the decomposition of calcium carbonate to calcium oxide and carbon dioxide is +178.3 kJ

You might be interested in
How many moles of water react with 0.946 mol of nitrogen dioxide
VARVARA [1.3K]
<span>the answer is
2.7 moles

</span>
5 0
3 years ago
Please help! trying to past :((
Margaret [11]

the block will move to F but at the same time make it's way over to G because 250g weighs more than 100g

3 0
3 years ago
Please help! I have no idea what a galactic symbol is. It says it on one of my science assignments and I'm confused. All I know
Ilya [14]
Hey, its alright bro! I gotchu.

Im pretty sure the galactic symbol is the same reference to the symbol of the element on the periodic table.
For an example (Hydrogen) is H 
So if im correct im pretty sure its referring to the symbols for each element

Hopefully this helps
4 0
3 years ago
Read 2 more answers
Which of these equations is balanced? a. H2SO4 + 2Al → Al2(SO4)3 + H2 b. 2KCl + Pb(NO3)2 → 2KNO3 + PbCl2
Lapatulllka [165]
The answer is B, you just check if it is the same on the left and right side

A:
Left side - Right side
2xH - 2xH
1xS - 3xS
4xO - 12xO
2xAl - 2xAl

Therefore A is not correct

B:
Left side - right side
2xK - 2xK
1xCl - 1xCl
1xPb - 1xPb
2xN - 2xN
6xO - 6xO

B is therefore correct as both sides add up
6 0
3 years ago
Read 2 more answers
Answer sixteen please
Elis [28]

The answer to question 16 is CO and MgO

5 0
3 years ago
Other questions:
  • 80.0 ML of fluorine gas is held in a flexible vessel at STP. If the vessel is transported to the surface of Venus where the pres
    5·2 answers
  • In acidic solution, the breakdown of sucrose into glucose and fructose has this rate law: rate = k[H+][sucrose].
    8·1 answer
  • What exponent should you use to represent one hundred thousand?
    6·1 answer
  • What is true of a synthesis reaction?
    6·2 answers
  • A 6 kg rock is sitting at the edge of a 100 m tall cliff. What is the potential energy of the rock with respect to the ground?
    13·1 answer
  • What is the element presented, in this compound?
    8·2 answers
  • The concentration of glucose inside a cell is 0.12 mM. Outside the cell the concentration of glucose is 12.9 mM. Calculate the c
    15·1 answer
  • Name the three kinds of sub-atomic particles found in an atom: Protons Axons Polyhedrons Electrons Neutrons
    9·1 answer
  • Which of the following is true about extinction? A. Only one extinction has occurred during the Earth's history. B. Plant specie
    6·2 answers
  • How many grams of propanol (C3H7OH, 60.10 g/mol) would be needed to make 750 mL of a solution with an osmotic pressure of 25 atm
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!