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Chemistry energy question and answer

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Chemistry Energy Question and Answer
A copper ornament has a mass of 69.3 grams and changes from a temperature of 20.0 degrees C to 27.4 degrees C. how much heat energy did it gain? (C for copper is 0.40 J/g degrees Celsius.)
A 12.5 grams sample of granite initially at 82.0 degrees c is immersed into 25.0 grams of water initially at 22.0 degrees c. what is the final temperature of both substances when they reach thermal equilibrium? (for water, c=4.18 j/g degrees c, and for granite, c= 0.790 j/g degrees c.)
A student adds 5.0 g of a chemical to one liter of liquid and observers a reaction. If the reaction is endothermic, what will happen?
The temperature of a sample of water changes from 35 degrees Celsius to 45 degrees Celsius when the sample absorbs 678 joules of heat. What is the mass of the sample?

Reference no: EM132687487

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