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2 years ago

Can someone please help me, best answer gets BRAINLIEST

Chemistry

1 answer:

salantis [7]2 years ago

7 0

Answer:

9839 is your answer mate .

Plz mark brainliest and follow me ❤❤❤❤

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Calculate the ΔG for the following system. Then state if the system is spontaneous or not spontaneous. ΔH = 147 kJ ΔS = -67.0 J/

lbvjy [14]

Answer:

ΔG for the given system is 28.421 kJ. The system is non spontaneous.

Explanation:

ΔH = 147 kJ =147,000 J= Enthalpy of the system

ΔS = -67.0 J/K = Entropy change

T = 149 °C = 422.15 K = Temperature of the system

((T)°C=273.15 +T K)

ΔG = Gibbs free energy ?

The Gibbs free energy 's expression is given by:

ΔG = ΔH - T ΔS

ΔG > 0 , non spontaneous
ΔG < 0, spontaneous

$\Delta G^o=147,000 J-422.15 K\times (-67.0)$

ΔG = 28,421 J = 28.421 kJ

Since, value of Gibbs free energy is positive this means that reaction is non spontaneous.

5 0

3 years ago

A _ reaction occurs when a substance usually containing carbon reacts with oxygen to produce energy in the form of light and hea

trapecia [35]

A COMBUSTION reaction occur when a substance ...........................................
Combustion reaction is also known as burning. It occurs when an hydrocarbon react with oxygen to yield carbon dioxide, water and energy in the form of light and heat. Combustion reaction can not take place in the absence of oxygen.

3 0

3 years ago

Air bags are activated when a severe impact causes a steel ball to compress a spring and electrically ignite a detonator cap. Th

Sedaia [141]

Answer:

154 g

Explanation:

Step 1: Write the balanced decomposition equation

2 NaN₃(s) ⇒ 2 Na(s) + 3 N₂(g)

Step 2: Calculate the moles corresponding to 79.5 L of N₂ at STP

At STP, 1 mole of N₂ occupies 22.4 L.

79.5 L × 1 mol/22.4 L = 3.55 mol

Step 3: Calculate the number of moles of NaN₃ needed to form 3.55 moles of N₂

The molar ratio of NaN₃ to N₂ is 2:3. The moles of NaN₃ needed are 2/3 × 3.55 mol = 2.37 mol.

Step 4: Calculate the mass corresponding to 2.37 moles of NaN₃

The molar mass of NaN₃ is 65.01 g/mol.

2.37 mol × 65.01 g/mol = 154 g

6 0

3 years ago

Use the collision theory to discuss how temp., concentration and surface area affect the rate of a chemical reaction?

pogonyaev

The collision theory explains how chemical reactions are made and different reactions have different reaction rates

Hope it helps.

4 0

3 years ago

Which statement accurately describes binary star systems?

Yakvenalex [24]

Answer:

The correct answer is D.They have stars that may appear to wobble.

Explanation:

Binary star - Wikipediaen.wikipedia.org › wiki › Binary_star

''Astronomers have discovered some stars that seemingly orbit around an empty space. Astrometric binaries are relatively nearby stars which can be seen to wobble around a point in space, with no visible companion. The same mathematics used for ordinary binaries can be applied to infer the mass of the missing companion''

-Wikipediaen.wikipedia.org › wiki › Binary_star

-Edge 2021

might be a lil late but YW

4 0

2 years ago

Read 2 more answers