Jesset C.

asked • 07/24/21

Can someone please check-over my answers to these Chemistry problems?

1. Which of the following is NOT correct?

A. Calorimetry involves an insulated container holding a liquid, usually water.

B. An object of high temperature is placed into the calorimeter.

C. The temperature change of the object and the water will be equal.

D. The heat absorbed by the water is equal to the heat lost by the object.

E. Calorimetry is a process that measures the heat released or absorbed during a chemical or physical change.


2. The specific heat of plastic is 50 times greater than the specific heat of lead, 10 times greater than the specific heat of stone, and 1.5 times greater than the specific heat of water. If the samples of plastic, lead, stone, and water have identical masses and identical starting temperatures, and are given identical increases in energy of 1,000 J, which sample will end up with the highest temperature?

A. plastic

B. lead

C. stone

D. water

E. None of the Above

 

3. A 0.500 kg mass of unknown metal at 100.00 oC is placed in 120.0 g H2O at 25.00 oC. The final temperature of the water and metal is 30.00 oC. Ignoring the container, what is the specific heat of the metal? ( c-water = 4.184 J/goC)

A. 0.00717 J/goC

B. 0.0142 J/goC

C. 0.0717 J/goC

D. 0.142 J/goC

E. None of the Above




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