Question

The specific heat of water is greater than the specific heat of ethanol. What sample will...

The specific heat of water is greater than the specific heat of ethanol. What sample will have the smallest decrease in temperature when it evolves 500 J of heat? All samples begin at the same temperature.

A. 10 g of water

B. 10 g of ethanol

C. 50 g of water

D. 50 g of ethanol

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Homework Answers

Answer #1

Answer - C. 50 gm of water

Explanation -

we know the equation

q = mass of material specific heat of material T

if we increase the mass of material then we require more enrgy should evolve but energy given in problem is 500 J it is fixed thus we increase mass decrese T that mean smallest tempreture decreases. thus 50 gm material is correct choice

if specific heat of material is high more energy should evolve but enegy evolution is fixed 500 J therefore specific heat is high more energy evolve and smallest tempreture decreases water have greater specific heat than ethanol thus less decrease in tempreture .

Hense answer is 50 g of water

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