Answer:
10g of Pb.
Explanation:
To know which answer is correct, let us calculate the change in the temperature of each substance. This is illustrated below:
For water:
Mass (M) = 10g
Specific heat capacity (C) = 4.18J/g°C
Change in temperature (ΔT) = ..?
Heat (Q) = 100J
Q = MCΔT
Divide both side by MC
ΔT = Q/MC
ΔT = 100 / (10 x 4.18)
ΔT = 2.4°C
Therefore, the change in the temperature of water is 2.4°C
For Ag:
Mass (M) = 10g
Specific heat capacity (C) = 0.235J/g°C
Change in temperature (ΔT) = ..?
Heat (Q) = 100J
Q = MCΔT
Divide both side by MC
ΔT = Q/MC
ΔT = 100 / (10 x 0.235)
ΔT = 42.6°C
Therefore, the change in the temperature of Ag is 42.6°C
For Ca:
Mass (M) = 10g
Specific heat capacity (C) = 0.650J/g°C
Change in temperature (ΔT) = ..?
Heat (Q) = 100J
Q = MCΔT
Divide both side by MC
ΔT = Q/MC
ΔT = 100 / (10 x 0.650)
ΔT = 15.4°C
Therefore, the change in the temperature of Ca is 15.4°C
For Fe:
Mass (M) = 10g
Specific heat capacity (C) = 0.449J/g°C
Change in temperature (ΔT) = ..?
Heat (Q) = 100J
Q = MCΔT
Divide both side by MC
ΔT = Q/MC
ΔT = 100 / (10 x 0.449)
ΔT = 22.3°C
Therefore, the change in the temperature of Fe is 22.3°C
For Pb:
Mass (M) = 10g
Specific heat capacity (C) = 0.160J/g°C
Change in temperature (ΔT) = ..?
Heat (Q) = 100J
Q = MCΔT
Divide both side by MC
ΔT = Q/MC
ΔT = 100 / (10 x 0.160)
ΔT = 62.5°C
Therefore, the change in the temperature of Pb is 62.5°C
Summary:
Substance >> Change in temperature
Water >>>>>> 2.4°C
Ag >>>>>>>>> 42.6°C
Ca >>>>>>>>> 15.4°C
Fe >>>>>>>>> 22.3°C
Pb >>>>>>>>> 62.5°C
From the calculations made above, Pb has the greatest change in temperature
