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2 years ago

6. List the following particles in size order, from biggest to smallest?

Chemistry

1 answer:

Arte-miy333 [17]2 years ago

5 0

Answer:

the particles, molecules, and gas range from smallest to largest in the following order: electron < proton < atom <...

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A screw has 4 threads per centimeter and a circumference of 2 centimeters. The mechanical advantage of the screw is?

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3 years ago

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Why does mecury hardly evaporate in room temperature

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2 years ago

Sunspots sit on the sun’s

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The answer is Photosphere Apex.

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3 years ago

Where are electrons received and donated at in a galvanic cell?

Vikki [24]

Explanation:

In a galvanic cell, the cathode is positively charged and the anode is negatively charged.

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3 years ago

There are two steps in the usual industrial preparation of acrylic acid, the immediate precursor of several useful plastics. In

adell [148]

Answer:

The net change in enthalpy for the formation of one mole of acrylic acid from calcium carbide, water and carbon dioxide is 523.2 kJ.

Explanation:

Step 1:

$CaC_2(s) + 2H_2O(g)\rightarrow C_2H_2(g) + Ca(OH)_2(s),\Delta H_1=414.0 kJ$ ...[1]

Step 2 :

$6C_2H_2(g) + 3CO_2(g) + 4H_2O(g)\rightarrow 5CH_2CHCO_2H(g) \Delta H_2=132.0kJ$ ..[2]

Adding 6 × [1] and [2]:

$6CaC_2(s) + 12H_2O(g)\rightarrow 6C_2H_2(g) + 6Ca(OH)_2(s)$

$6C_2H_2(g)+3CO_2(g)+16H_2O(g)\rightarrow 5CH_2CHCO_2H(g)$

we get :

$6CaC_2(s) + 8H_2O(g)+3CO_2(g)\rightarrow 5CH_2CHCO_2H(g)+ 6Ca(OH)_2(s),\Delta H'=?$

$\Delta H'=6\times \Delta H_1+\Delta H_2$

$\Delta H'=6\times 414.0 kJ+132.0kJ$

$\Delta H'=2,626 kJ$

Energy released on formation of 5 moles of acrylic acid = 2,626 kJ

Energy released on formation of 1 mole of acrylic acid:

$\frac{ 2,626 kJ}{5 } = 523.2 kJ$

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3 years ago