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lora16 [44]
3 years ago
8

How many kj of heat are needed to completely vaporize 3.30 moles of h2o?

Chemistry
1 answer:
r-ruslan [8.4K]3 years ago
8 0
Water requires 40.65 kJ of heat per mole to vaporize it completely

Multiply this by the number of moles you have

40.65 kJ x 3.3 moles = 134.145 kJ

Hope I helped you out!
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Calculate the mass in grams for each of the following liquids.
WITCHER [35]
The density is calculated as mass per volume, so if we want to solve for mass, we would multiply density by volume.
For Part A: if we have a density of 0.69 g/mL, and a volume of 280 mL, multiplying these will give a mass of: (0.69 g/mL)(280 mL) = 193.2 g. Rounded to 2 significant figures, this is 190 g gasoline.
For Part B: if we have a density of 0.79 g/mL, and a volume of 190 mL, multiplying these will give a mass of: (0.79 g/mL)(190 mL) = 150.1 g. Rounded to 2 significant figures, this is equal to 150 g ethanol.
3 0
3 years ago
Which of the following Substances would have the highest vapor pressure at 298 K?
elena-14-01-66 [18.8K]
The answer is D. hope I was right
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3 years ago
A certain gas has a volume of 500.0 mL at 77.0°C and 600KPa. Calculate the temperature if the volume decreased to 400.0 mL and t
Jlenok [28]

Answer:

354.67K

Explanation:

Applying

P₁V₁/T₁ = P₂V₂/T₂................. Equation 1

Where Where P₁ = initial pressure, T₁ = Initial temperature, V₁ = Initial Volume, P₂ = Final pressure, V₂ = Final Volume, T₂ = Final Temperature.

From the question, we are ask to look for the final temperature,

Therefore we make T₂ the subject of the equation

T₂ = P₂V₂T₁/P₁V₁............. Equation 2

Given: P₁ = 600 kPa, V₁ = 500 mL, T₁ = 77 °C = (273+77) = 350 K, P₂ = 760 kPa, V₂ = 400.0 mL

Substitute these values into equation 2

T₂ = (760×400×350)/(600×500)

T₂ = 354.67 K

3 0
3 years ago
Please help and explain how to do it need the answer asap, please.
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Answer:

45 and 20 c2 Or4

Explanation:

8 0
3 years ago
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Answer:

The correct answer is B. and C. according to me!

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3 years ago
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