A substance is in the form of a solid at 0 °C. The amount of heat added to this substance and the temperature of the substance are plotted on the graph.

Amount of heat (in Joule)

If the specific heat capacity of the solid substance is 500 J/kg °C, find from the graph; the mass of the substance;

40 g

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30 g

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20 g

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50 g

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Solution

The correct option is C
20 g

Let m be the mass of the substance.

Heat gained by the substance = m x c x ∆t

or m x 500 x (80 - 0) = 800

or m x 5 x 80 = 8

or m = 8/80 x 5 = 1/50 k

= 1000/50 g = 20 g.

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A substance is in the form of a solid at 0 °C. The amount of heat added to this substance and the temperature of the substance are plotted on the graph. Amount of heat (in Joule) If the specific heat capacity of the solid substance is 500 J/kg °C, find from the graph; the mass of the substance;

The correct option is C 20 gLet m be the mass of the substance. Heat gained by the substance = m x c x ∆t or m x 500 x (80 - 0) = 800 or m x 5 x 80 = 8 or m = 8/80 x 5 = 1/50 k = 1000/50 g = 20 g.

A substance is in the form of a solid at 0 °C. The amount of heat added to this substance and the temperature of the substance are plotted on the graph.

Amount of heat (in Joule)

If the specific heat capacity of the solid substance is 500 J/kg °C, find from the graph; the mass of the substance;

The correct option is C
20 g

Let m be the mass of the substance.

Heat gained by the substance = m x c x ∆t

or m x 500 x (80 - 0) = 800

or m x 5 x 80 = 8

or m = 8/80 x 5 = 1/50 k

= 1000/50 g = 20 g.