Two glasses contain 500 mL of liquid. the liquid in glass A has a temperature of

Question

Two glasses contain 500 mL of liquid. the liquid in glass A has a temperature of 66degree C, the (different) liquid in glass B has a temperature of 94degree C. the liquid in glass A has a larger specific heat than the liquid in glass B. the two liquids are mixed together in a larger glass. Is the final temperature of the mixture greater than, less than, or the same as the average temperature of 80degree C of the two glasses? Explain your reasoning. Two glasses contain 500 mL of water each. the water in glass A has a temperature of 66degree C, the water in glass B has a temperature of 94degree C. the two glasses of water are mixed together in a larger glass. Is the final temperature of the mixture greater than, less than, or the same as the average temperature of 80degree C of the two glasses? Explain your reasoning.

Explanation / Answer

1 )

heat lost = heat gained

d X 500 X S X ( T - 66 ) = d X 500 X S X ( 94 - T )

final temperature is 80o C

here the two liquids have same specific heat and also the same mass..

2 )

using Using SA > SB  

dA X 500 X SA X ( T - 66 ) = dB X 500 X SB X ( 94 - T )

T = ( 94 SB + 66 SA ) / ( SA + SB )

Less than

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