1.The temperature of a sample of iron with a mass of 10.0 g changed from 50.4°C to 25.0°C with the release of 47 J of heat. What is the specific heat of iron? 2.A 200-g sample of an unknown object is heated using 100 J such that its temperature rises from 2°C to 4’C. What is the specific heat of this unknown object?

3. A 500 gram cube of lead is heated from 25 °C to 75 °C. How much energy was required to heat the lead? The specific heat of lead is 0.129 J/g°C.

4. A glass of water of mass 400 g is heated using an electric heater for 3 minutes . The temperature change of the water is from 50C to 120C when 500J of energy is supplied to it. Find the specific heat capacity of water and also find the power of the heater.

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