Q.1
When applying the first law of thermodynamics to a system, when is heat a positive quantity?
  • when the system does work
  • when the system has work done on it
  • when the system absorbs heat
  • when the system loses heat
  • when no work is done either on the system or by the system
Q.2
The kind of heat transfer that travels through space in electromagnetic waves is ______________________.
  • insulation.
  • Radiation
  • Conduction
  • Convection
Q.3
In physics, there is no such thing as
  • heat
  • cold
  • energy
  • temperature
Q.4
The _____ Law of Thermodynamics says that heat always flows from an object with a higher temperature to an object of lower temperature naturally
  • Zeroth
  • First
  • Second
  • Third
Q.5
DON'T RUSH, YOU HAVE TIME.Frying an egg on a skillet. Referring to the egg, would the Enthalpy change be positive or negative?
  • Skillet is absorbing heat energy from the egg. Absorbing energy is Endothermic. Endothermic has a positive Enthalpy
  • Egg absorbing heat energy from the skillet. Absorbing energy is Endothermic. Endothermic has a positive Enthalpy
  • Egg absorbing heat energy from the skillet. Releasing energy is Exothermic. Exothermic has a positive Enthalpy
  • Egg absorbing heat energy from the skillet. Releasing energy is Exothermic. Exothermic has a negative Enthalpy
Q.6
The measure of average kinetic energy of all the particles within an object is called ____________.
  • temperature
  • conduction
  • radiation
  • heat
Q.7
DON'T RUSH, YOU HAVE TIME. Water droplets condensing on the inside of a window on a cold day. Is this process exothermic or endothermic?
  • Gases condense to form liquids. Gases are moving faster than liquids, the air around the window has a higher temperature/kinetic energy. Releasing energy to get water droplets, which is is Exothermic
  • Gases condense to form liquids. Gases are moving faster than liquids, the air around the window has a higher temperature/kinetic energy. Releasing energy to get water droplets, which is is Endothermic
  • Gases condense to form liquids. Gases particles are moving slower than liquids. Releasing energy to get water droplets, which is is Endothermic
  • Gases condense to form liquids. Gases particles are moving slower than liquids. Releasing energy to get water droplets, which is is Exothermic
Q.8
Exothermic reactions...
  • Absorb energy
  • Release energy
  • Release Color
  • Absorb Color
Q.9
All phase changes (changing states) requires energy to be added or taken away.
  • True
  • False
Q.10
Heat travels from the sun to the earth by the process of...
  • conduction
  • convection
  • radiation
  • insulation
Q.11
When you place the metal in boiling water, heat flows from the _________ to the _______.
  • metal to the boiling water
  • bottom of the metal to the top half of the metal
  • bottom of the water to the top of the water
  • boiling water to the metal
Q.12
Stored energy that results from the position or shape of an object is called...
  • Thermal
  • Potential
  • Kinetic
  • Gravitational
Q.13
If the specific heat of water is 4,J/kg∙°C, how much heat is required to increase the temperature of 1.2 kg of water from°C to°C?
  • -80,371.2 J
  • 44,938.6 J
  • 80,371.2 J
  • 112,575.9 K
Q.14
A sample of iron receives 50.J of heat energy that raises the temperature of the iron 25.0°C. If iron has a specific heat of 0.J/g°C, what is the mass of the iron sample?
  • 25 g
  • 30 g
  • 20 g
  • 50 g
Q.15
If I heat up 2 pans of water one hasmL in it and one has 1000mL. Which one heats up the fastest?
  • 100 mL
  • 1000 mL
  • They both heat up at the same speed
  • They cool down.
Q.16
How many Joules of energy are required to makegrams of ice at 0 οC completely melt? The specific latent heat of fusion of ice isJ/kg
  • 200 J
  • 400 J
  • 33,400 J
  • 2,000,000 J
Q.17
Particles (molecules) in a ______________________ have less energy than the other states of matter.
  • gas
  • solid
  • liquid
Q.18
How much energy is required to completely boil awayofC water? Use C = 4.J/goC for water, and Hv =J/g.
  • 56,484 J
  • 339,000 J
  • 395,484 J
  • 385,484 J
Q.19
One molecule of oxygen consists of __________ atoms of oxygen.
  • 2
  • 4
  • 8
  • 16
Q.20
For the same maximum pressure and temperature,
  • Otto cycle is more efficient than Diesel cycle
  • Diesel cycle is more efficient than Otto cycle
  • Dual cycle is more efficient than Otto and Diesel cycles
  • Dual cycle is less efficient than Otto and Diesel cycles
Q.21
Molecular volume of any perfect gas at×N/m² and 27°C will be
  • 4.17 m3/kg mol
  • 400 m3/kg mol
  • 0.15 m3/kg mol
  • 41.7 m3/kg mol
Q.22
An actual engine is to be designed having same efficiency as the Carnot cycle. Such a proposition is
  • Feasible
  • Impossible
  • Possible
  • Possible, but with lot of sophistications
Q.23
What does the "U" stand for the formula ∆U = Q + W
  • Heat
  • Temperature
  • Work
  • Internal energy
Q.24
H2 + 2 C + N2 + 270.3 kJ --> 2 HCNIs this reaction endothermic or exothermic?
  • Endothermic
  • Exothermic
Q.25
In which of the following systems is entropy increasing?
  • Putting together a puzzle
  • Putting books on a shelf
  • Breaking a plate
  • Filling a jar of salt
Q.26
How can energy be transferred from a cool object to a warm object?
  • Work must be done
  • Increase thermal energy
  • Use convection
  • Q=mTC
Q.27
The 1st Law of Thermodynamics says that temperature exists
  • True
  • False
Q.28
Which situation best represents convection?
  • Heat from a campfire
  • A hot air balloon taking off
  • Touching a hot piece of metal
  • Getting sunburned
Q.29
The handle of a metal spoon warms up when it is placed in a hot bowl of soup because of
  • Convection
  • Conduction
  • Radiation
  • insulation.
Q.30
A molecule consisting of one atom is known as
  • Mono-atomic
  • Di-atomic
  • Tri-atomic
  • Poly-atomic
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