A total of 178 J of work is done on a gaseous refrigerant while it undergoes compression. If 33 J of heat is released during this process, what is the total change in internal energy of the system? 211 J O 5.4 J O -211 J 145 JAn engine has a hot reservoir at 100 J and a cold reservoir at 50 J. What is the engine's efficiency? 3 1009*u Specific heat depends on the of a substance. O amount O temperature O timing O typeIn an isovolumetric process, the work done is: O positive zero O negative O constantCheck all that apply. The energy needed to change a substances phase depends on: Specific Heat Latent Heat Mass TemperatureHow much energy is required to melt 0.0342 kg of ice at 0.00*C? (Lf = 3.33 x 105 J/kg) 11400 J 19200 J 12700 J 15600 JA high entropy system is one that can do: O hard work O little work O efficiency O lots of workWhich of the following systems has high entropy? O A clean and organized bedroom O Organized shelf of DVDs O Pencil shavings scattered randomly across a desk O A neatly stacked tower of building blocks. Check all that apply. The three phases of matter that we have studied are: D Plasma I:I Gas III Solid III Liquid A 6.7 kg piece of metal displaces 0.8 liters of water when submerged. Calculate the density of the metal. (1 liter = 0.001 m3) 5920 kg/ m3 5269 kg/ m3 8375 kg/ m3 7543 kg/ m3. One hundred joules of work is done on a system at 10,325 Pa. By how much does the volume change? Z) 0001 m3 A 2.73 kg object displaces 0.3 liters of water when submerged. Calculate the density of the object in kg/m3. (1 liter = 0.001 m3) 9100 kg/ m3 6700 kg/ m3 1200 kg/ m3 22400 kg/ m3. An engine does 10 J of work, however it requires 100 J of heat to do that work. What is the engine's efficiency? O 1% 10% 100% 1000%-. In an ideal case, the conservation of energy applies to a: 3 particle. 3 system. 3 set of principles. 3 environment. . When does heat spontaneously ow from hot to cold? 3 Sometimes 3 When entropy is involved 3 Tuesdays 3 Never Check any that apply. In a roller coaster ride, three main types of energy associated with the motion of the cart are: Heat Energy Kinetic Energy Potential Energy Quantum EnergyAccording to the first law of thermodynamics, when work is positive, the change in internal energy must: increase decrease fluctuate stay the sameA gas is compressed in a hydraulic system slowly, so that the temperature of the gas remains constant. This is known a process. isothermal adiabatic isochoric isovolumetric. In an isothermal process, the first law of thermodynamics tells us that: Q = W O AU = Q AU = W OW+Q=0is the amount of energy needed to change the temperature of a 1 kg of a substance by 1*C. Latent Heat of Fusion Heat Constant Latent Heat of Vaporization Specific Heat Capacity.The 3 weaker 3 stronger the specific heat capacity of a substance, the harder it is to Change its temperature. How much heat must be used to heat 0.50 kg of water by 25*C? (Cwater = 4186 J/kg*C) 52,000 J 52 J 520,000 J 5.2 JA piece of copper weighs 2.45 N in air. When the copper is placed beneath the surface of a liquid, an underwater scale reads 1.16 N. What is the buoyant force on the piece of copper? O 2.11 N O 2.84 N 3.61 N O 1.29 NCalculate the water pressure in the pipes at the bottom of a school building that is fed by water reservoir 22.0 m above on the roof. The density of water is 997 kg/ms. O 788000 N/ m2 O 345000 N/ m2 O 215000 N/m2 111000 N/ m2. When water vapor immediately changes to ice. this is called: 3 Deposition D Evaporation D Sublimation D Condensation A lead brick with a mass of 4.5 kg has an initial temperature of 33.C. If the lead brick is placed in 1.2 kg of 68'C water, what will the final temperature be? (Cwater = 4186 J/kg*C, Clead = 129 J/kg.C) 37'C 56 C 64.C 79.CWhen we discuss the conservation of energy, we understand that some energy is always lost to the environment but: 3 but it comes back later in life. 3 we do not talk about it. D it cannot be measured. 3 it does not disappear. :_ Ice oats on water because: 3 It is denser than water 3 It is colder 3 It is less dense than water 3 It has the same density as water How much energy is required to melt 1.94 kg of ice at 0.00*C? (Lf = 3.33 x 105 J/kg) 18900 J 723000 J 125000 J 646000 JYour car tires heat up when they get hot. This would be classified as work. destructive constructive D negative positive