Recall the last time you bought a cup of coffee or hot chocolate on a particularly cold day. The cup likely felt warm when you held it in your hand. The cup your beverage came in is not too different from the ones we used in this experiment. Based on this, do you think a coffee cup is a perfect insulator? If not, how might this affect your results? Group of answer choices No; the specific heat calculated is lower than it should be due to the heat lost Yes; the specific heat calculated is lower than it should be due to the heat lost No; results will not be affected since the calorimeter contains all heat indefinitely Yes; results will not be affected since the calorimeter contains all heat indefinitely

3. A 74.5 g piece of metal at 86.0°C is placed in 133 g of water at 21.0°C contained in a calorimeter. The metal and water come to the same temperature at 24.2°C. How much heat (in J) did the metal give up to the water? (Assume the specific heat of water is 4.18 J/g·°C across the temperature range.)  J What is the specific heat (in J/g·°C) of the metal?  J/g·°C 4. A 0.528 g sample of KCl is added to 51.7 g of water in a calorimeter. If the temperature decreases by 1.07°C, what is the approximate amount of heat (in J) involved in the dissolution of the KCl, assuming the heat capacity of the resulting solution is 4.18 J/g°C?  J Is the reaction exothermic or endothermic? exothermicendothermic  5. When 2.56 g of methane burns in oxygen, 128 kJ of heat is produced. What is the enthalpy of combustion (in kJ) per mole of methane under these conditions?  kJ/mol methane 6. Joseph Priestly prepared oxygen in 1774 by heating red mercury(II) oxide with sunlight focused through a lens. How much…

Copper wires used to transport electrical current heat up because of the resistance in the wire. If a 162-g wire gains 285 J of heat, what is the change in temperature of the wire? Copper has a specific heat of 0.384 J g-1 C-1.

How much heat would be required to raise 499 g of water from 111 oC to 251 oC? (You need to know what physical state water is in for the temperature range we're looking at.) Specific heats of water in different physical states H2O (s) = 0.497 cal/g. oC H2O (l) = 1.00 cal/g. oC H2O (g) = 0.490 cal/g. oC