An unknown mass of each of the following substances, initially at 23.0?C, absorb

Question

An unknown mass of each of the following substances, initially at 23.0?C, absorbs 1980J of heat. The final temperature is recorded as indicated. Find the mass of each substance.

Part A

a. Pyrex glass (Tf=55.4?C)

Express your answer using two significant figures.

ANSWER:

m =

g

Part B

sand (Tf=62.1?C)

Express your answer using two significant figures.

ANSWER:

m =

g

Part C

ethanol (Tf=44.2?C)

ANSWER:

m =

g

Part D

water (Tf=32.2?C)

Express your answer using two significant figures.

ANSWER:

m =

g

m =

g

Explanation / Answer

specific heat of

pyrex glass = 840

sand = 800

ethanol = 548

water = 4180

Q= ms[T]

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