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 2 4 . 8 C to 8 1 . 4 C . 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 4 6 0 J to increase its temperature from 1 9 . 3 C to 6 8 . 9 C . What is the specific heat capacity of the substance?

Q3:

Object A, at 1 0 C , and object B, at 2 0 C , are brought into contact with one another. In which direction does thermal energy flow?

  • AIn neither direction
  • BFrom object B to object A
  • CFrom object A to object B

Q4:

A chemical reaction heats a 10 cm3 block of tin (density 7.31 g/cm3) by 2 5 C . The same reaction heats a 15 cm3 block of lead (density 11.3 g/cm3) by 1 9 C .

What is the specific heat of tin, 𝑐 S n , as a multiple of the specific heat of lead, 𝑐 P b ?

  • A 𝑐 S n = 0.74 𝑐 P b
  • B 𝑐 S n = 1.2 𝑐 P b
  • C 𝑐 S n = 1.8 𝑐 P b
  • D 𝑐 S n = 0.57 𝑐 P b
  • E 𝑐 S n = 1.5 𝑐 P b

Q5:

An insulated cup contains 100 mL of water at 1 5 C . 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?

  • A 20 mL of water at 6 0 C
  • B 40 mL of water at 4 0 C
  • C 10 mL of water at 8 0 C
  • D 5 mL of water at 1 0 0 C
  • E 80 mL of water at 2 0 C

Q6:

A 70.0 g piece of metal at 8 0 . 0 0 C is placed into 100 g of water at 2 0 . 0 0 C . The metal and water reach a constant temperature of 2 3 . 9 0 C , and no heat is lost to the surroundings. The specific heat of water is 4 . 1 8 6 / J g C .

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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