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일반화학/[05장] 열화학

51.1 g aluminum at 95.0℃ + 35.0 g water at 40.0℃

by 영원파란 2022. 2. 11.

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51.1 g aluminum at 95.0℃ + 35.0 g water at 40.0℃

 

 

51.1 g sample of aluminum at 95.0℃

is dropped into 35.0 g of water at 40.0℃.

What is the final temperature of the mixture?

> specific heat capacity of aluminum = 0.89 J/g•℃

> specific heat capacity of water = 4.184 J/g•℃

 

---------------------------------------------------

 

q = C m Δt

( 참고 https://ywpop.tistory.com/2897 )

 

 

 

final temperature = x 라 두면,

 

고온 물질이 잃은 열(–q) = 저온 물질이 얻은 열(+q)

–[(0.89) (51.1) (x – 95.0)] = +[(4.184) (35.0) (x – 40.0)]

 

–45.479x + 4320.505 = 146.44x – 5857.6

 

(146.44 + 45.479)x = 4320.505 + 5857.6

 

x = (4320.505 + 5857.6) / (146.44 + 45.479) = 53.03

 

 

 

답: 53℃

 

 

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