Worksheet: Specific Heat

In this worksheet, we will practice calculating the specific heat of a material from a change in temperature and the amount of heat transferred.

Q1:

A piece of unknown substance weighs 52.0 g and requires 383 J to increase its temperature from 24.8C to 81.4C. What, to three significant figures, is the specific heat capacity of the substance?

Q2:

A piece of unknown solid substance weighs 437.2 g and requires 8,460 J to increase its temperature from 19.3C to 68.9C. What is the specific heat capacity of the substance?

Q3:

Object A, at 10C, and object B, at 20C, are brought into contact with one another. In which direction does thermal energy flow?

  • AFrom object A to object B
  • BFrom object B to object A
  • CIn neither direction

Q4:

A chemical reaction heats a 10 cm3 block of tin (density 7.31 g/cm3) by 25C. The same reaction heats a 15 cm3 block of lead (density 11.3 g/cm3) by 19C.

What is the specific heat of tin, 𝑐Sn, as a multiple of the specific heat of lead, 𝑐Pb?

  • A𝑐𝑐SnPb=1.2
  • B𝑐𝑐SnPb=0.57
  • C𝑐𝑐SnPb=0.74
  • D𝑐𝑐SnPb=1.8
  • E𝑐𝑐SnPb=1.5

Q5:

An insulated cup contains 100 mL of water at 15C. When this water is warmed, its density and specific heat remain approximately constant. Which of the following, if poured into the cup, would increase the temperature of its contents by the largest amount?

  • A80 mL of water at 20C
  • B40 mL of water at 40C
  • C5 mL of water at 100C
  • D10 mL of water at 80C
  • E20 mL of water at 60C

Q6:

A 70.0 g piece of metal at 80.00C is placed into 100 g of water at 20.00C. The metal and water reach a constant temperature of 23.90C, and no heat is lost to the surroundings. The specific heat of water is 4.186/JgC.

To 3 significant figures, how much heat is transferred from the metal to the water?

What is the specific heat of the metal?

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