3 years ago

Given the incomplete equation representing a reaction:

Chemistry

1 answer:

Akimi4 [234]3 years ago

3 0

O is what should go in the blank. O stands for Oxygen.

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Consider the following reaction at 298 K:

faltersainse [42]

Answer :

$\Delta S_{sys}$ = -1622.8 J/K

$\Delta S_{surr}$ = -94.6 J/K

$\Delta S_{univ}$ = 0 J/K

Explanation : Given,

$\Delta H$ = -483.6 kJ

The given chemical reaction is:

$2H_2(g)+O_2(g)\rightarrow 2H_2O(g)$

First we have to calculate the value of $\Delta S_{sys}$ .

$\Delta S_{sys}=\frac{\Delta H}{T}$

$\Delta S_{sys}=\frac{-483.6kJ}{298K}$

$\Delta S_{sys}=-1.6228kJ/K=-1622.8J/K$

Entropy of system = -1622.8 J/K

As we know that:

Entropy of system = -Entropy of surrounding = 1622.8 J/K

and,

Entropy of universe = Entropy of system + Entropy of surrounding

Entropy of universe = -1622.8 J/K + (1622.8 J/K)

Entropy of universe = 0

8 0

3 years ago

Which of the following is most likely to be the best conductor of electricity?

Annette [7]

Lead is most likely the best conductor

3 0

3 years ago

Read 2 more answers

The specific heat capacity of aluminum is 0.22 cal/g°C. How much energy needs to flow into 20.0 grams of aluminum to change its

True [87]

Answer:

C) 66 calories

Explanation:

The Heat energy required to flow into a unit mass object to raise its temperature by 1 degree is known as specific heat capacity.

specific heat capacity of aluminum, c = 0.22 cal/g°C

mass of aluminium, m = 20.0 g

7 0

4 years ago

What happen to the size of balloon if it is gone to upward direction ?

natima [27]

Answer:

nothing happens

Explanation:

this just means that the density is lower than the air

3 0

3 years ago

Crude oil pumped out of the ground may be accompanied by formation water, a solution that contains high concentrations of nacl a

djverab [1.8K]

solution:

the change in the boiling point is given as,

dTbp =2.30°c

elevation constant for the solvent is given by,

kb=0.512°c/m

$molality=\frac{dTBP}{KB\times m}\\=\frac{2.30}{0.512c/m}$

= 4.49m

8 0

3 years ago