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Title: Specific Heat Post by: iamnew on Sep 11, 2011 Specific Heat question?
Substance Specific heats water - 4.18 ethyl alcohol - 2.44 benzene - 1.80 sulfuric acid - 1.40 Based on the following information which is true? Choose all that apply? A) More heat is required to raise the temperature of 1 g of water 1 than to raise the temperature of 1 g of ethyl alcohol 1 . B) Sulfuric acid is less resistant to temperature change than water. C) Water has a high specific heat due to the hydrogen bonding between water molecules. D) More heat is required to raise the temperature of 1 g of benzene 1 than to raise the temperature of 1 g of water 1 . E) Water is less resistant to temperature change than ethyl alcohol. F) Benzene is more resistant to temperature change than sulfuric acid. G) Ethyl alcohol likely exhibits more hydrogen bonding than water. Title: Re: Specific Heat Post by: bio_man on Sep 11, 2011 A) More heat is required to raise the temperature of 1 g of water 1 than to raise the temperature of 1 g of ethyl alcohol 1 . TRUE FALSEB) Sulfuric acid is less resistant to temperature change than water. TRUE C) Water has a high specific heat due to the hydrogen bonding between water molecules. TRUE D) More heat is required to raise the temperature of 1 g of benzene 1 than to raise the temperature of 1 g of water 1 . FALSE E) Water is less resistant to temperature change than ethyl alcohol. FALSE F) Benzene is more resistant to temperature change than sulfuric acid. TRUE G) Ethyl alcohol likely exhibits more hydrogen bonding than water. Title: Re: Specific Heat Post by: iamnew on Sep 11, 2011 That was the same answers given on the "ask yahoo" and they were wrong. But thank you for your help anyway. The correct answer is False, False, False, True, True, True, True.
Title: Re: Specific Heat Post by: bio_man on Sep 11, 2011 More heat is required to raise the temperature of 1 g of water 1 than to raise the temperature of 1 g of ethyl alcohol 1.
I can't see why that's false :-\ Title: Re: Specific Heat Post by: star on Sep 11, 2011 Title: Re: Specific Heat Post by: bio_man on Sep 11, 2011 Kind of like what we have here (though not a forum), but for all types of questions. Title: Re: Specific Heat Post by: DJ on Sep 12, 2011 More heat is required to raise the temperature of 1 g of water 1 than to raise the temperature of 1 g of ethyl alcohol 1. I can't see why that's false :-\ When something boils, it goes from a liquid to a gas. The forces between the molecules must be broken in order for something to boil. So, if something has strong forces between its molecules, more energy will need to be put in to boil the something. Ethanol has fairly weak forces (dispersion forces) between its molecules. Water has strong polar bonds between its molecules. More energy is needed to break water's polar bonds than ethanol's dispersion forces. That means water has a higher boiling point, because more energy is needed to break the forces between its molecules. |