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
pashok25 [27]
3 years ago
12

1. Which of the following is a correctly written thermochemical equation?

Chemistry
2 answers:
Harman [31]3 years ago
8 0
1. Which of the following is a correctly written thermochemical equation?C3H8 (g) + 5O2 (g) 3CO2 (g) + 4H2O (l), H = 2,220 kJ/mol

It is the answer because it shows everything needed to describe a reaction. It has the state and the heat of reaction.

2. How does a phase change affect a thermochemical equation?

It can affect the (delta) H value. It can either increase or decrease that value.

WITCHER [35]3 years ago
7 0

Explanation:

1. Thermochemical equation is balance stoichiometric chemical equation written with the phases of the reactants and products in the brackets along with the enthalpy change of the reaction.

The given correct thermochemical reactions are:

Fe(s)+O_2(g)\rightarrow Fe_2O_3(s),\Delta H = 3,926 kJ


C_3H_8(g)+5O_2 (g)\rightarrow 3CO_2 (g)+4H_2O(l),\Delta H= 2,220 kJ/mol

2. Phase change affect the value of the enthalpy change of the thermochemical equation. This is because change in phase is accompanied by change in energy. For example:

H_2O(s)\rightarrow H_2O(g),\Delta H_{s}=51.1 kJ/mol

H_2O(l)\rightarrow H_2O(g),\Delta H_{v}=40.65 kJ/mol

In both reaction phase of water is changing with change in energy of enthalpy of reaction.

You might be interested in
How would life be different if there were 10 hours in a day
Anna71 [15]

Answer:

If there was only 10 hours in a day, including the night time it would be complexly new environment. Say you are up for 7 hours and sleep 3, in those 7 hours you would go to work for probably 4 hours, come home and do stuff for 3 then go to bed and do it all over again.

8 0
3 years ago
What is the pH of a 0.028M solution (pH= -log(M))<br><br> A) 3.56<br> B) 2.88<br> C) 1.55<br> D) 1
kupik [55]

Answer:

1.55

Explanation:

-log(M)=pH

- Hope that helps! Please let me know if you need further explanation.

4 0
3 years ago
If 20 grams of N2 react completely with H2 , how many moles of NH3 are produced? Show Work
Maslowich
This is the balanced eq
N2 + 3H2 -> 2NH3
first you need to find mole of N2 by using
mol = mass ÷ molar mass.
mol N2= 20g ÷ (14.01×2)g/mol
=0.7138mol
then look at the coefficient between H2 and NH3.
it is N2:NH3
1:2
0.7138:0.7138×2
0.7138:1.4276 moles
moles of NH3 = 1.4276 moles
5 0
3 years ago
Is Naci a metal or none metel
Schach [20]

Answer:

Salt (NaCl) is an ionic bond that consists of Sodium (Na) which is a metal with positive charge combines with Chlorine (Cl), a nonmetal with a negative charge.

Explanation:

3 0
3 years ago
How many moles of aspartame are present in 2.00 mg of aspartame?
ludmilkaskok [199]
Hope this helps, have a nice day!

8 0
3 years ago
Other questions:
  • Which elements have isotopes with the same number of protons and neutrons
    14·1 answer
  • The red lionfish (shown below) is a voracious predator of small fish, including young angelfish and parrotfish. In the Caribbean
    11·1 answer
  • What is thermal equilibrium?
    6·2 answers
  • The properties of matter depend on the types of atoms a substance is made of.<br> true of false?
    13·2 answers
  • How does thermal energy flow as you hold a glass of ice water?
    6·2 answers
  • During which change of state does the thermal energy of a substance increase
    14·1 answer
  • Which electron transition is accompanied by
    13·1 answer
  • Calcular las fracciones molares de los componentes de una disolución formada por: 250 g de agua, 50 g de ácido acético y 25 g de
    6·1 answer
  • A 95.0 g sample of copper (Cp = 0.20 J/°C·g) is heated to 82.4°C and then placed in a container of water (Cp= 4.18 J/°C·g) at 22
    15·2 answers
  • When carbon-containing compounds are burned in a limited amount of air, some CO(g) as well as CO₂(g) is produced. A gaseous prod
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!