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3 years ago

Explain intermolecular forces cause water molecules to stick to a material like a glass pitcher

Chemistry

1 answer:

natulia [17]3 years ago

6 0

Answer:

Cohesive forces cause the water molecules to stick together with a lot of elasticity, allowing the water to function very much like a rubber into a material like a glass pitcher.

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Use Hess's Law to calculate the enthalpy change for the reaction

Marysya12 [62]

Answer:

ΔH = 125.94kJ

Explanation:

It is possible to make algebraic sum of reactions to obtain ΔH of reactions (Hess's law). In the problem:

1. 2W(s) + 3O2(g) → 2WO3(s) ΔH = -1685.4 kJ

2. 2H2(g) + O2(g) → 2H2O(g) ΔH = -477.84 kJ

-1/2 (1):

WO3(s) → W(s) + 3/2O2(g) ΔH = 842.7kJ

3/2 (2):

3H2(g) + 3/2O2(g) → 3H2O(g) ΔH = -716.76kJ

The sum of last both reactions:

WO3(s) + 3H2(g) → W(s) + 3H2O(g)

ΔH = 842.7kJ -716.76kJ

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4 years ago

What is the symbol for an atom containing 20 protons and 22 neutrons?

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It is an isotope of Calcium, which has the symbol Ca

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Evgen [1.6K]

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3 years ago

In bullet points: explain the difference between thermal energy, heat and temperature.

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Explain intermolecular forces cause water molecules to stick to a material like a glass pitcher​

Explain intermolecular forces cause water molecules to stick to a material like a glass pitcher