The latent heat of vaporization of ethanol is 200 calories/gram. This means that _____.

a) about 200 calories of heat must be added to 1 gram of ethanol to change its temperature
b) about 200 calories of heat must be added to 1 gram of ethanol to convert it from a solid to a liquid
c) about 200 calories of heat must be added to 1 gram of ethanol to convert it from a liquid to a gas

How do I figure this one out?

How do you figure this out?

Learn what the heat of vaporization is:

http://www.physlink.com/education/askexperts/ae93.cfm

Okay, thank you.

a block of aluminum weighing 140. g is cooled from 98.4 c to 62.2 c with the release of 1080 joules of heat. from this data, calculate the specific heat of aluminum

What amount of heat is required to raise the temperature of 20 grams of water from 10°C to 30°C? The specific heat of water is 4.18 J/g°C.Select one of the options below as your answer: A. 1200 joules B. 1500 joules C. 2000 joules D. 2300 joules E. 3000 joules

To figure out the correct answer, you need to understand what the latent heat of vaporization represents. The latent heat of vaporization is the amount of heat energy required to convert a substance from a liquid to a gas at its boiling point, without a change in temperature. In this case, the latent heat of vaporization of ethanol is given as 200 calories/gram.

Now, let's consider the options:

a) "About 200 calories of heat must be added to 1 gram of ethanol to change its temperature" - This option is incorrect because the latent heat of vaporization does not relate to a change in temperature.

b) "About 200 calories of heat must be added to 1 gram of ethanol to convert it from a solid to a liquid" - This option is incorrect because ethanol is a liquid at room temperature and does not exist as a solid.

c) "About 200 calories of heat must be added to 1 gram of ethanol to convert it from a liquid to a gas" - This option is correct. The latent heat of vaporization is the amount of heat required to convert 1 gram of ethanol from a liquid to a gas without changing its temperature.

Therefore, the correct answer is c) about 200 calories of heat must be added to 1 gram of ethanol to convert it from a liquid to a gas.