Specific Heat Calculations

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Presentation transcript:

Specific Heat Calculations

What you need to know Heat Formula: Q = mcp∆t Q – heat transferred (J) m- mass (g or kg) Cp - specific heat capacity (J/g·C° or J/kg·C°) ∆t - temperature change (C°)

Question 1 Heat Formula: Q = mcp∆t Specific heat capacity of water – 4. 186 J/g C0 Temperature change of the water – 10 C 0 Mass of water – 60 grams Find the heat transferred - ?

Question 2 Heat Formula: Q = mcp∆t A copper mass is placed in water and changes the water’s temperature from 60 0 C to 55 0 C. The water has a mass of 50 grams and a specific heat capacity of 4.186 J/ g0 C What was the amount of heat transferred from the water to the copper mass?

Question 3 Formula for specific heat: cp = Q/m∆t Heat transferred – 30 Joules Mass of substance – 100 grams Change in temp.- 10 0 C Find the specific heat of this substance

Question 4 A substance with a mass of 10 grams is heated to 100 0 C. The substance is placed in cold water and reaches equilibrium with the water at 50 0 C. The amount of heat transferred from the substance to the water is 500 Joules. Calculate the specific heat capacity of the substance