All categories

3 years ago

In which reaction would the activation energy result in an endothermic reaction?

Chemistry

2 answers:

miv72 [106K]3 years ago

7 0

Answer : The correct option is, An egg cooking

Explanation :

Endothermic reaction : It is a type of chemical reaction in which the energy is absorbed from the surrounding.
Exothermic reaction : It is a type of chemical reaction in which the energy is released into the surrounding.

Water freezing : It is an exothermic process. In this process, the heat is released when the phase changes from the liquid state to solid state.

An egg cooking : It is an endothermic process. In this process, the heat is absorbed when the phase changes from the solid state to liquid state.

A candle burning : It is an exothermic process because the more amount of heat is released when candle burns.

Iron rusting : It is an exothermic process because heat is released during the iron rusting process.

Hence, an egg cooking is an endothermic reaction.

egoroff_w [7]3 years ago

3 0

Just did the test.

Answer is "An egg cooking".

I thought it was a candle burning because it keeps going until the light goes out but was wrong :( lol.

Hope this helps!

You might be interested in

Green light has a wavelength of 550nm. What is the frequency of a photon of green light?

Vikki [24]

Answer:- Frequency is $5.4*10^1^4Hz$ .

Solution:- frequency and wavelength are inversely proportional to each other and the equation used is:

$\nu =\frac{c}{\lambda }$

where, $\nu$ is frequency, c is speed of light and $\lambda$ is the wavelength.

Speed of light is $3.0*10^8m/s$ .

We need to convert the wavelength from nm to m.

( $1nm=10^-^9m$ )

$550nm(\frac{10^-^9m}{1nm})$

= $5.5*10^-^7m$

Now, let's plug in the values in the equation to calculate the frequency:

$\nu =\frac{3.0*10^8m.s^-^1}{5.5*10^-^7m}$

= $5.4*10^1^4s^-^1$ or $5.4*10^1^4Hz$

since, $1s^-^1=1Hz$

So, the frequency of the green light photon is $5.4*10^1^4Hz$ .

4 0

3 years ago

Give the ratio that balances out the following equation: ___Cr + ___Pb(NO3)4 ---> ___ Cr(NO3)3 + ____ Pb

gizmo_the_mogwai [7]

Answer: Ratio : 4, 3, 4, 3 are the answers.

Explanation:

6 0

3 years ago

A groundwater (GW) was analyzed for ions and the results are reported below: Ca2+ = 200 mg/L (as Ca2+) Mg2+ = 60 mg/L (as Mg2+)

garri49 [273]

Answer:

Answer is given below.

Explanation:

Alkalinity = 400 mg/L in terms of CaCO3

a.) Total Hardness is defined as the sum of calcium and magnesium iion concentration in terms of CaCO3

Total Hardness = [Ca+2]*{50/20) + [Mg+2]*{50/12) = [200]*{50/20) + [60]*{50/12) = 750 mg/L in terms of CaCO3

b.) Non-Carbonate hardness = Total Hardness - Carbonate Hardness

Now here as the Total Hardness is greater than alkalinity ,Thus

Carbonate Hardness = Alkanlinity = 400 mg/L in terms of CaCO3

Non-Carbonate hardness = 750 - 400 = 350 mg/L in terms of CaCO3

c.) As Total hardness is greater than Alkalinity thus Carbonate hardness is equal to the Alkalinity.

Carbonate hardness = 400 mg/L in terms of CaCO3

d.) Now as the Total hardness of the ground water is more than 180 mg/L,Thus it needs removal of hardness.

There are many treatment options for the removal of hardness:

i) Ion Exchange method

ii) Lime soda method

5 0

3 years ago

Write a balanced equation for the combustion of isooctane,C8 H16 a component of gasoline.

algol13

Answer: The balanced chemical equation for the combustion of isooctane is written below.

Explanation:

Combustion reactions are defined as the reactions in which a hydrocarbon reacts with oxygen gas to produce carbon dioxide and water. Heat is released during these reactions.

A balanced chemical equation is defined as the equation in which total number of individual atoms on the reactant side is equal to the total number of individual atoms on product side.

The balanced chemical equation for the combustion of isooctane follows:

$C_8H_{16}+12O_2\rightarrow 8CO_2+8H_2O$

By Stoichiometry of the reaction:

1 mole of isooctane reacts with 12 moles of oxygen gas to produce 8 moles of carbon dioxide and 8 moles of water molecule.

Hence, the balanced chemical equation for the combustion of isooctane is written above.

5 0

3 years ago

<img src="https://tex.z-dn.net/?f=%5Ctext%7BThis%20is%20for%20a%20school%20project.%20I%20just%20need%20help%20on%20these%20two%

BigorU [14]

Answer:

Water molecules in the solid state, such as in ice and snow, form weak bonds (called hydrogen bonds) to one another. These ordered arrangements result in the basic symmetrical, hexagonal shape of the snowflake.

Explanation:

5 0

3 years ago