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katovenus [111]
2 years ago
14

The reason it takes so much heat to melt ice or evaporate water is that extra energy is required to break _______ bonds between

water molecules.
Chemistry
1 answer:
mart [117]2 years ago
4 0

It takes so much heat to melt ice or evaporate water because extra energy is required to break the hydrogen bonds between water molecules.

<h3>Hydrogen bond</h3>

Hydrogen bonding is an electrostatic force of attraction between a hydrogen atom found between a pair of other atoms having a high affinity for electrons.

Hydrogen bonds cause water to be exceptionally attracted to each other creating cohesion.

It takes so much heat to melt ice or evaporate water because extra energy is required to break the hydrogen bonds between water molecules.

Find out more on Hydrogen bond at: brainly.com/question/12798212

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How much heat is needed to raise the temperature of 55.0 g sample of water by 65.0 oC.
sveticcg [70]

Answer: 14943.5 J

Explanation:

The quantity of heat energy (Q) required to raise the temperature of a substance depends on its Mass (M), specific heat capacity (C) and change in temperature (Φ)

Thus, Q = MCΦ

Given that,

Q = ?

Mass of water = 55.0g

C = 4.18 J/g°C

Φ = 65.0°C

Then, Q = MCΦ

Q = 55.0g x 4.18 J/g°C x 65.0°C

Q = 14943.5 J

Thus, 14943.5 joules of heat is needed to raise the temperature of water.

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A 10.0-milliliter sample of NaOH(aq) is neutralized by 40.0 milliliters of 0.50 M HCl. What is the molarity of the NaOH(aq)?
Ludmilka [50]
\frac{10 mL}{1000 mL}  = 0.01 L

\frac{40mL}{1000mL} =0.04L

M _{1} V_{1}=M_{2}V_{2}

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3 years ago
What is a the volume of a salt crystal measuring 3.22 x 10^-2 cm by 1.5 x 10^-4 cm by 4.30 x 10^-3 cm?
aleksandr82 [10.1K]
Dimension of the salt crystal is:

Length = 3.22 x 10^-2 cm

Breadth = 1.5 x 10^-4 cm

Height = 4.30 x 10^-3 cm

So it is cuboidal in shape.

Volume = L × B × H

V = 3.22 \times  {10}^{ - 2}  \times 1.5 \times  {10}^{ - 4}  \times 4.30 \times  {10}^{ - 3}  \\  \\ V = 3.22 \times 1.5 \times 4.30 \times  {10}^{ (- 2 - 3 - 4)}  \\  \\ V = 20.769\times  {10}^{ - 9} \\  \\ V = 2.0769 \times  {10}^{ - 8} \\  \\ V  \approx 2.1 \times  {10}^{ - 8} \:  {cm}^{3}  \\  \\  \boxed{ \red{ \bold{answer: a}}}
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2 years ago
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