A copper cylinder has a mass of 76.8 g and a specific heat of 0.0920 J/ g degrees c. It is heated to 86.5 degrees c and then put into 68.7 g of turpentine whose temperature is 19.5 deg c. The final temperature of the mixture is 31.9 deg c. What is the specific heat of the turpentine?

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It is a mixture. simply put, a compound must be pure, that is, of only one chemical structure and composition. a mixture is made of different chemical substances (i.e. elements, molecules, compounds) that are not chemically bonded to each other, but instead physically grouped together, as in the case of gasoline (a homogeneous solution).