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3 years ago

Which statement is most accurate about energy absorbed and released in this chemical reaction?

Chemistry

1 answer:

topjm [15]3 years ago

5 0

Answer:

D. It is an exothermic reaction and energy is released from the system

Explanation:

Hope it helps you in your learning process.

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Explain the reaction of metals with water.

telo118 [61]

Answer:

it rusts

Explanation:

4 0

4 years ago

Relative to electrons and electron states, what does the ml quantum number specify

Anastaziya [24]

Magnetic quantum number specify orientation of electrons in magnetic field and number of electron states (orbitals) in subshells..
Magnetic quantum number (ml) specifies the orientation in space of an orbital of a given energy and shape . Magnetic quantum number divides the subshell into individual orbitals which hold the electrons, there are 2l+1 orbitals in each subshell. For example, p orbitals (and their electrons) have three orientations in spase (px, py and pz).

8 0

4 years ago

A sample of gaseous PCl₅ was introduced into an evacuated flask so that the pressure of pure PCl₅ would be 0.50 atm at 523 K. Ho

Lera25 [3.4K]

Answer:

Kp = 0.2215

Kc = 0.0052

Explanation:

Step 1: The balanced equation

PCl5(g) → PCl3(g) + Cl2(g)

Step 2: given data

Initial pressure PCl5 = 0.50 atm

Temperature = 523 Kelvin

The actual pressure in the flask was found to be 0.74 atm.

Step 3: Calculate the pressure after the decomposition

Pressure of PCl5 after decomposition = 0.5 - X

Since the equation has a ratio 1:1 the pressure after the decomposition of PCl3 and Cl2 is X

Step 4: Calculate total pressure at equilibrium

0.74 atm = 0.5 atm - X + 2X

X = 0.74 - 0.5 = 0.24 atm

Step 5: Calculate Kp

Kp = P(PCl3)* P(Cl2) / P(PCl5)

Kp = 0.24² / 0.26 = 0.2215

Step 6: Calculate Kc

The ideal gas wet: P*V = nRT

with P= the pressure of the gas in atm

with V= the volume of the gas in L

with n= the number of moles

with R= the gas constant in L*atm/mol*K

T = the temperature in Kelvin

P= nRT/V

Kp= Kc*(RT)^Δn

Kc=Kp/(RT)^Δn

Kc= 0.2215 / (0.08206*523)^1

Kc= 0.0052

7 0

3 years ago

What does jupiter and saturn have in common and what do they don't

choli [55]

They are both gas giants and have rings. but unlike Saturn's rings being made of ice and is visible Jupiter's rings are dark and hard to see. they are also made of tiny rock and dust.

5 0

4 years ago

Read 2 more answers

An 8.5 g. Of ethanol (C2H5OH) placed in a constant volume calorimeter and the temperature rose to 3.2°C. Find the heat of reacti

Vlad [161]

Answer:

$\Delta H_{rxn}=-0.111 \frac{kJ}{mol}$

Explanation:

Hello!

In this case, since the total heat flow due to the reaction equals the negative of the calorimeter's heat, we can first compute the former as shown below:

$Q_{rxn}=-C\Delta T\\\\Q_{rxn}=6.38\frac{J}{\°C}*3.2\°C=-20.416J$

Now, since this total heat flow due to the reaction is defined in terms of the heat of reaction and the total reacted moles:

$Q_{rxn}=n*\Delta H_{rxn}$

Thus, we compute the moles in 8.5 g of ethanol:

$n=8.5g*\frac{1mol}{46.08g}=0.185mol$

Therefore, the heat of reaction results:

$\Delta H_{rxn}=\frac{Q_{rxn}}{n} =\frac{-20.416J}{0.185mol} =-110.7J/mol\\\\\Delta H_{rxn}=-0.111 \frac{kJ}{mol}$

Best regards!

8 0

3 years ago