Chemistry 1125 Final Exam Study Guide- Questions and Correct Answers
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Course
Chem 1125
Institution
Chem 1125
A transfer of heat is the same as a) temperature b) energy c) both b) energy
do all single covalent bonds have the same energy? a) yes b) no, they are different because they have different atoms c) no, because they have different numbers of atoms d) no, because they have different types of bonds b...
Chemistry 1125 Final Exam Study Guide - Questions and Correct Answers A transfer of heat is the same as a) temperature b) energy c) both ✅b) energy do all single covalent bonds have the same energy? a) yes b) no, they are different because they have different atoms c) no, because they have different numbers of atoms d) no, because they have different types of bonds ✅b) no, they are different because they have different atoms if it takes +436 KJ of energy to break a bond, how many KJ are released when the same bond is formed? a) + 436 KJ b) -436 KJ c) + 872 KJ d) 0 KJ ✅b_ -436 KJ The enthalpy for the reaction H2 + Cl2 --> 2HCl is found to be -183 KJ. This reaction is... a) exothermic b) endothermic ✅a) exothermic the work done to compress a gas is 74 KJ. As a result, 26 J of heat is given off to the surroundings. The total energy change for this reaction is... a) + 100 J b) + 48 J c) -48 d -100 J ✅b) + 48 J consider the following data: Al - 10 g - SH = .900 - T = 40 degrees Cu - 30 g - SH = .385 - T = 60 degrees When these two metals are placed in contact, which of the following will take place? a) heat will flow from Al to Cu because Al has a larger specific heat b) heat will flow from Cu to Al because Cu has a larger mass c) heat will flow from Cu to Al because Cu has a larger heat capacity d) heat will flow from Cu to Al because Cu is at a higher temperature ✅d) heat will flow from Cu to Al because Cu is at a higher temperature Thermodynamics is the study of what? a) the transfer of energy b) the creation of energy c) the speed of reactions d) the effect of heat on the speed of a reaction ✅a) the transfer of energy A substance with a high specific heat: a) is always extremely hot b) requires a lot of energy to become hot c) is not heavy d) does not require a lot of energy to become hot ✅b) requires a lot of energy to become hot the amount of heat required to raise the temperature of 1g of something by 1 C, is called... a) total heat b) specific heat c) heat of formation d) heat capacity ✅b) specific heat the first law of thermodynamics states that energy cannot be created nor destroyed only transferred. This is also known as: a) specific heat b) conservation of energy c) exothermic reaction d) potential energy ✅b) conservation of energy Air is a solution of 79% nitrogen and 20% oxygen. Which exerts a greater pressure? a) nitrogen b) oxygen c) both exert the same pressure d) neither, the greatest pressure is produced by other gases such as argon ✅a) nitrogen a sample of nitrogen gas in a 4.5 L container at a temperature of 27 C exerts a pressure of 4.1 atm. Another identical container at the same temperature and pressure contains hydrogen gas. It is true that: a) the number of moles of gas are the same b) the hydrogen sample contains more moles c) the nitrogen container contains more moles
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