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3 years ago

Why is it necessary to specify temperature when giving Ka value

Chemistry

1 answer:

Yuliya22 [10]3 years ago

5 0

Answer:

Because the equilibrium constant is only at constant at temperature. Changing the temperature changes the Ka.

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The following thermochemical equation is for the reaction of nitrogen(g) with oxygen(g) to form nitrogen dioxide(g). N2(g) + 2O2

Rzqust [24]

Answer: The mass of nitrogen gas reacted to produce given amount of energy is 5.99 grams.

Explanation:

The given chemical reaction follows:

$N_2(g)+2O_2(g)\rightarrow 2NO_2(g);\Delta H=66.4kJ$

We know that:

Molar mass of nitrogen gas = 28 g/mol

We are given:

Enthalpy change of the reaction = 14.2 kJ

To calculate the mass of nitrogen gas reacted, we use unitary method:

When enthalpy change of the reaction is 66.4 kJ, the mass of nitrogen gas reacted is 28 grams.

So, when enthalpy change of the reaction is 14.2 kJ, the mass of nitrogen gas reacted will be = $\frac{28}{66.4}\times 14.2=5.99g$

Hence, the mass of nitrogen gas reacted to produce given amount of energy is 5.99 grams.

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3 years ago

Write one paragraph to explain what circuler motion is?

ZanzabumX [31]

Answer:

When a body moves in a circle with constant speed , it is said to be in uniform circular motion .

Explanation:

When an object moves in a circular path , its direction changes at each point .
This change in direction result in change of velocity (velocity is vector quantity which changes if direction of the object change) .However speed do not change (it is scalar quantity , not affected by Direction)

The Change in velocity produce acceleration ( a = v - u)

Hence The object always produce acceleration in uniform circular motion .So, Some force (centripetal force) is needed to keep the object in circular motion.

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3 years ago

Jack lives in a small city in the Pacific Northwest, where the temperatures are cool all year and the sky is frequently cloudy a

kirill [66]

Answer:

Preocouparcor ,imsm oilp

Explanation:

3 0

3 years ago

Can someone please help me, best answer gets BRAINLIEST

salantis [7]

Answer:

9839 is your answer mate .

Plz mark brainliest and follow me ❤❤❤❤

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3 years ago

Separation technique used to separate mud and water without heating

Murrr4er [49]

Answer:

Separation technique used to separate mud and water without heating:

Sedimentation-Decantation

Explanation:

1.The settling of the heavier particle at the bottom when the container is left undisturbed is called sedimentation.

In a mixture of Mud and water :

In this process the heavy mud particles settle at the bottom due to their high density .

2. Decantation : It is the process of pouring out the upper clear layer of the light particles.

In a mixture of Mud and water :

The water is lighter and form a clear layer over the settled mud particles. Hence by decantation the clear water is poured into a clean separate container

Thus mud remain in the bottom and the mixture is separated

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3 years ago

Why is it necessary to specify temperature when giving Ka value​

Why is it necessary to specify temperature when giving Ka value