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circle the substance that will take more energy to heat from 20 degreeC to 100 drgreeC and explain why?
a) 30g of water vs. 300 g of water
B) 500g of iron vs. 500 g of silver
2 Answers
- kuiperbelt2003Lv 79 years agoFavorite Answer
a) 300g of water will take ten times more energy than 30 g of water because of the mass difference
b) iron has a higher specific heat than silver (about twice as much), so 500g of iron requires more energy
- Anonymous9 years ago
Oh man gee does a gram of water take more energy to heat than a million tons? Oh poor kid, how could you possibly figure out if it takes more energy to heat 300 grams than 30 grams. Wow, You'd need an IQ of at least 80 to figure that out.
The specific heat of silver is *about* the same as (or slightly more than) that of iron. Specific heat is per mole. Iron has an atomic weight of ~55 and Ag ~104. The question is to check your understanding of the difference between number units and mass units.
