The mass of the water is 14.9 g
Explanation:
When a certain amount of a susbtance is heated, the temperature of the substance increases according to the equation
[tex]Q=mC_s \Delta T[/tex]
where
Q is the amount of energy supplied to the substance
m is the mass of the substance
[tex]C_s[/tex] is its specific heat capacity
[tex]\Delta T[/tex] is the change in temperature
In this problem, we have:
Q = 2500 J of energy supplied to the water
[tex]C_s = 4.186 J/gC[/tex] is the specific heat capacity of water
[tex]\Delta T=60 C - 20 C = 40^{\circ}C[/tex] is the change in temperature of the water
Therefore we can solve for m to find the mass of the water:
[tex]m=\frac{Q}{C_s \Delta T}=\frac{2500}{(4.186)(40)}=14.9 g[/tex]
Learn more about specific heat capacity:
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