2 years ago

Which statement best explains what causes the phase change from solid ice to liquid water?

Chemistry

1 answer:

Fofino [41]2 years ago

6 0

It would be c because it has to get hot so it is absorbing the heat not releasing it

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Calculate the energy (in kJ) required to heat 10.1 g of liquid water from 55 oC to 100 oC and change it to steam at 100 oC. The

Maksim231197 [3]

Answer:

$\large\boxed{\large\boxed{24.6kJ}}$

Explanation:

1. Energy to heat the liquid water from 55ºC to 100ºC

$Q=m\times C\times \Delta T$

m = 10.1g

C = 4.18g/JºC

ΔT = 100ºC - 55ºC = 45ºC

$Q=10.1g\times 4.18J/g\ºC\times 45\ºC=1,899.81J$

2. Energy to change the liquid to steam at 100ºC

$L=\lambda \times n$

λ = 40.6kJ/mol

n = 10.1g / 18.015g/mol = 0.5606mol

$L=40.6kJ/mol\times 0.5604mol=22.76214kJ=22,762.14J$

3. Total energy

$1,899.81J+22,762.14J=24,661.95J\approx24,662J\approx24.6kJ$

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3 years ago

A. How the molecules in a solid, liquid and gas compare to each other.

andre [41]

A. The molecules of solids are close together and compact, liquids are spread out but not too far apart, and gas molecules are really far apart.

B. Increase in temperature causes pressure to go up. Decrease in temperature cause pressure to go down

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3 years ago

Write the net ionic equation for the precipitation of calcium sulfide from aqueous solution

Fantom [35]

Answer:

Answer is Ca2+(aq)+S2-(aq)=>CaS(s)

Explanation:

I hope it's helpful!

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Arlecino [84]

Explanation:

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Al and Cl2.

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Which of the following is true about the coefficients in a balanced chemical equation?

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Answer:

Where is the chemical equations?

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