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
ehidna [41]
3 years ago
8

When hydrogen gas reacts with oxygen gas under certain conditions to produce liquid water, 572.0 kJ of heat energy is released.

Is the reaction exothermic or endothermic?
Chemistry
1 answer:
frozen [14]3 years ago
7 0

Answer : This reaction is an exothermic reaction.

Explanation :

Endothermic reaction : It is defined as the chemical reaction in which the energy is absorbed from the surrounding.

In the endothermic reaction, the energy of reactant are less than the energy of product.

Exothermic reaction : It is defined as the chemical reaction in which the energy is released into the surrounding.

In the exothermic reaction, the energy of reactant are more than the energy of product.

Enthalpy of reaction : It is the difference between the energy of product and the reactant. It is represented as \Delta H.

The balanced chemical reaction will be:

H_2(g)+O_2(g)\rightarrow H_2O(l)+572.0kJ

From the reaction we conclude that the heat energy is released during the reaction that means this reaction is an exothermic reaction.

Hence, the reaction is an exothermic reaction.

You might be interested in
When a sample of a gas is heated in a sealed, rigid container from 200. K to 400. K, the pressure exerted by the gas is:
gavmur [86]
When a sample of a gas is heated in a sealed, rigid container from 200 degree Kelvin to 400 degree Kelvin, the pressure exerted by the gas is increased by a factor 2. Heating any gas actually increases the volume of the gas within a container. As the temperature of the gas rises, the molecules of the gas start moving faster and start striking the walls of the container in which it is kept with more force. The volume of the container tries to expand to accommodate the fast colliding molecules of the gas.


5 0
3 years ago
Calculate delta Gº for the following system:
Llana [10]

Answer:

ΔG = - 442.5  KJ/mol    

Explanation:

Data Given

delta H = -472 kJ/mol

delta S = -108 J/mol K

So,

delta S = -0.108 J/mol K

delta Gº = ?

Solution:

The answer will be calculated by the following equation for the Gibbs free energy

                    G = H - TS

Where

G = Gibbs free energy

H = enthalpy of a system (heat

T = temperature

S = entropy

So the change in the Gibbs free energy at constant temperature can be written as

                ΔG = ΔH - TΔS . . . . . . (1)

Where

ΔG = Change in Gibb’s free energy

ΔH = Change in enthalpy of a system

ΔS = Change in entropy

if system have standard temperature then

T = 273.15 K

Now,

put values in equation 1

                  ΔG = (-472 kJ/mol) - 273.15 K (-0.108 KJ/mol K)

                 ΔG = (-472 kJ/mol) - (-29.5 KJ/mol)

                 ΔG = -472 kJ/mol + 29.5 KJ/mol

                 ΔG = - 442.5  KJ/mol          

7 0
3 years ago
Choose the compound below that should have the highest melting point according to the ionic bonding model. Choose the compound b
Bingel [31]

Answer:

AlN has highest melting point among given.

Explanation:

As per ionic model, ionic compounds are held together by electrostatic force. The ionic compound having strong electrostatic force will have high melting point.

Electrostatic force is proportional to charge and size of constituent ions.

F=k \frac{q_+\times q_-}{r^2}

In case of MgO

Charge on Mg = +2

Charge on O = -2

F=-k \frac{(+2)\times (--2)}{r^2}=\frac{4k}{r^2}

In case of LiF

Charge on Li = +1

Charge on F = -1

F=-k \frac{(+1)\times (-1)}{r^2}=\frac{1k}{r^2}

In case of AlN

Charge on Al = +3

Charge on N = -3

F=-k \frac{(+3)\times (-3)}{r^2}=\frac{9k}{r^2}

In case of RbF

Charge on Rb = +1

Charge on F = -1

F=-k \frac{(+1)\times (-1)}{r^2}=\frac{1k}{r^2}

In case of CaS

Charge on Ca = +2

Charge on S = -2

F=-k \frac{(+2)\times (-2)}{r^2}=\frac{4k}{r^2}

As magnitude of electrostatic force is highest in AlN, therefor, it has highest melting point.

4 0
3 years ago
A cube measuring 1cm x 1cm x 1cm is full of water, What is the mass of the water in the cube? (Water has a density of 1.0)
Finger [1]

d= m/v

1.0=m/1cm^3

1.0×1cm^3=m

m=1kg/cm^3

5 0
3 years ago
How does soil form from bare rock
Masteriza [31]
Weathering and erosion produce smaller rock particles which, when mixed with dust result in different types of soil.

Thank You!
PM me for more help!
3 0
3 years ago
Read 2 more answers
Other questions:
  • Molar mass is measured in units of
    7·1 answer
  • For the reaction 2N 2O(g) ⇌ O 2(g) + 2N 2(g), what happens to the equilibrium position if the pressure increases?
    12·1 answer
  • Draw the products for the proton transfer reaction between sodium hydride and ethanol
    14·1 answer
  • The positively charged particles found in the nucleus of an atom are called ______.
    6·1 answer
  • A reaction occurs via the following sequence of elementary steps. What is the reaction intermediate?
    12·1 answer
  • Cuántos moles de oxígeno se requieren para reaccionar con 8 moles de etanol?
    8·1 answer
  • Describe at least 3 biotic and 3 abiotic factors found in that ecosystem and do not tell which ecosystem you chose
    8·1 answer
  • Which of these metals will displace Iron from Iron Oxide ?
    8·1 answer
  • 4 Identify Give an example of a physical change and an example of a chemical change.
    10·1 answer
  • A sample of the mineral hematite Iron (III) oxide has a mass of 12.4g. How many moles of the mineral are present?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!