11. An electric motor produces energy to turn a fan blade. The energy used to turn the fan blade is always less than that produced by the motor. Where does the remainder of the energy go? O It is changed into light energy. It is converted to heat. O It is destroyed by friction. It is returned to the motor.

4 17 4.Determine the specific heat capacity of titanium if a 43.5 g sample absorbs 0.476 kJ (476J) as its temperaturé changes from 32.0°C to 53.0°C.

An automobile engine provides 515 Joules of work to push the pistons. In this process the internal energy changes by -2686 Joules. Calculate q for the engine. This represents the amount of heat that must be carried away by the cooling system. Heat = J

14. What is heat capacity? How is it used? Why is it important in chemistry? Explain your ideas and provide at least one relevant example to support your answer.

55.69 kJ of work are done by the system, which produces 80.17 kJ of heat. Determine the overall change in energy of the system in kilojoules.

A chemist measures the energy change AH during the following reaction: 2 Fe₂O3(s)→ 4 FeO(s) + O₂(g) Use the information to answer the following questions. This reaction is... Suppose 79.3 g of Fe₂O3 react. Will any heat be released or absorbed? If you said heat will be released or absorbed in the second part of this question, calculate how much heat will be released or absorbed. Round your answer to 3 significant digits. ΔΗ = 560. kJ O endothermic. O exothermic. O Yes, absorbed. O Yes, released. O No. x10 X S

A chemical reaction is run in which 484 Joules of heat are generated and the internal energy changes by -1070 Joules. calculate w for the system. w=____Joules

Calculate the energy required to heat 249.0 g of aluminum from -3.2 °C to 6.9 °C. Assume the specific heat capacity of aluminum under these conditions is - 1 -1 0.903 J'g K '. Round your answer to 3 significant digits. Ox10

An automobile engine generates 2210 Joules of heat that must be carried away by the cooling system. The internal energy changes by -2823 Joules in this process. Calculate w for the engine. This represents the work available to push the pistons in this process. Work = J

An aluminum can of a soft drink is placed in a freezer. Later,you find that the can is split open and its contents have frozen.Work was done on the can in splitting it open. Wheredid the energy for this work come from?