Question :
1.A calorie defined as exactly 4.184 J. Therefore 1.000 Cal : 1360903
1.A calorie is defined as exactly 4.184 J. Therefore 1.000 Cal is exactly
A.41.84 J.
B.418.4 J.
C.1000 J.
D.4184 J.
2.The heat of combustion of ethane, C2H6, is 1560 kJ/mol. What is the heat of combustion of ethane, in kJ per gram?
A.51.9 kJ/g
B.195 kJ/g
C.4.69 × 104 kJ/g
D.9.39 × 1026 kJ/g
3.The heat of combustion of methane, CH4, is 50.1 kJ/g. How much heat would be generated if 1.00 mol of methane undergoes complete combustion?
A.0.32 kJ
B.3.12 kJ
C.601 kJ
D.804 kJ
4.The energy that flows from a warmer body to a colder body is called
A.heat.
B.temperature.
C.potential.
D.work.
5.The property of matter that determines the direction of heat flow is the
A.mass.
B.temperature.
C.volume.
D.density.
6.The energy equivalent of a certain cheeseburger is approximately 525 Cal. Since 1 Cal is 4.184 kJ this corresponds to
A.1.25 kJ.
B.125 kJ.
C.220 kJ.
D.2200 kJ.
7.The energy stored in the chemical bonds of fossil fuels is a form of ______ energy.
A.electrical
B.mechanical
C.potential
D.kinetic
8.The energy of motion is called _________ energy.
A.electrical
B.mechanical
C.potential
D.kinetic
9.The first law of thermodynamics states that
A.energy is the capacity to do work.
B.doing work is defined as causing movement against a resisting force.
C.heat flows from a warmer body to a cooler body.
D.energy is neither created nor destroyed.
10.The conclusion that it is impossible to completely convert heat into work without making other changes in the universe is
A.based on erroneous observations.
B.the concept that increasing entropy characterizes all changes in the universe.
C.another way of stating that all energy is either thermal energy or heat.
D.the second law of thermodynamics.
