A certain coal-fired power plant has a rated power capacity of P = 960 MW. The output of this plant is W = 0.39QH, where QH is the energy input as heat from the hot reservoir. a. Write an equation for the efficiency of a heat engine in terms of QH and the heat QC exhausted to a low-temperature reservoir.  b. Which would increase the efficiency more, doubling QH or reducing QC by half?  c. Calculate the maximum thermal efficiency of the power plant.  d.  Calculate the absolute value of the exhausted heat (QC) each second in MJ for the power plant.

Q: A thermodynamic process occurs with a heat lost by the system. Does the entropy of the system…

A: No beacuse heat loss means increase in entropy according to second law  of thermodynamics.

Q: 1. A piston/cylinder has 2 kg water at 1000 kPa, 250°C which is now cooled with a constant loading…

A: in this question we determine volumes  by using Table B.1.2 and B.1.3 and then use heat transfer…

Q: nd Carnot efficiencies.

A:

Q: The efficiency of a Carnot heat engine is 25%. It takes 4000 J of heat input. What is the heat…

A:

Q: The temperature inside of a house is 27 ºC and outside is –23 ºC ? Determine the change in entropy…

A: The change in entropy of the system at constant temperature is given by  Where  = Entropy Change,…

Q: 0.2kg cup of tea at Ti=368.15K is left to cool down in a room at 293.15K.Above cup of tea iscooled…

A: Thermodynamics.

Q: a. How much heat is required to change 50 grams of ice, at an initial temperature of 0°C, to steam…

A: In given question, first the ice changes to water by absorbing  latent heat of fusion then the water…

Q: A domestic refrigerator sits in a kitchen, switched on, with the refrigerator door wide open. The…

A: To determine the correct statement regarding the situation. Given:The kitchen is an insulated system…

Q: A sophomore with nothing better to do adds heat to 0.350kg of ice at 0.0oC until it is all melted.…

A:

Q: A cyclical heat engine has 75 kJ of heat transfer that occurs to the enviornment for every 92 kJ of…

A:

Q: Half of a 1.5-kg block of ice melts at 0.00°C. What is the change in entropy of the ice? Note that…

A: given that,mass, m=1.5 kgheat of fusion L=333kJkgT=0°C=273 K

Q: 1. A heat engine is found to have an efficiency of 0.3. If it does 180 J of work per cycle, what are…

A:

Q: A heat engine exhausts its heat at 410 °C and has a Carnot efficiency of 28%. Part A What exhaust…

A:

Q: The coefficient of performance for a freezer is 7.8. a. How much heat must be extracted by the…

A: Given   Cop = n = 7.8  H1 = 2.3kJ  H3 = 330 J

Q: A heat engine with an efficiency of 35% takes in 1100 J of heat from the high-temperature reservoir…

A:

Q: Imagine a Carnot engine is designed to have a cold reservoir of 17° C and a hot reservoir at 570° C.…

A:

Q: 1. A heat engine takes in 90W of power from the hot reservoir and deposits 60W of power into the…

A:

Q: You want to heat your oven to 400°F. Given that your oven has a surface area of 1m2, about how much…

A: Given  Surface area of oven(A)= 1 m2 Temperature of oven (T) = 400°F We want to calculate power…

Q: x contains two balls that can be either blue or red. A blue ball has an energy -E0 while a red ball…

A: (a) The balls are blue and red, these balls can be distinguished. So these are classical particles.…

Q: A refrigerator has a coefficient of performance of 2.30. Each cycle it absorbs 3.23x10ª J of heat…

A:

Q: A Carnot engine extracts 200J of heat from a 600K hot reservoir every cycle. The cold reservoir…

A:

Q: When an aluminum bar is connected between a hot reservoir at 700 K and a cold reservoir at 300 K,…

A: Temperature of hot reservoir;T1 =700 K Temperature of cold reservoir;T2 =300 K Heat transferred…

Q: A Carnot engine draws heat energy from a hot temperature reservoir at 250oC and deposits heat energy…

A:

Q: A heat engine with an efficiency of 30% takes in 800 J of heat from the high-temperature reservoir…

A: Given: The efficiency of the heat engine is 30%. The heat input to the engine is 800 J.

Q: The heat capacity at constant volume Cy of a gas varies with temperature T, according to the…

A: The work done (W) during a thermodynamic process for an ideal gas is given as the product of the…

Q: A heat engine does 7300 J of work per cycle while absorbing 12 to 0 J of heat energy from the hot…

A:

Q: Choose the correct statements.   a. A system with a larger number of macrostates has a larger…

A: Answer: we know the relation between entropy and microstates :       S=k ln(W) where S= entropy…

Q: A heat pump moves heat from the chilly 8°C air outside a house to the toastier 21°C air inside. The…

A:

Q: second law of thermodynamics states that the entropy of the universe is constantly increasing. Which…

A:

Q: 2. A system has the fundamental relation S= AN/4 V 1/4U1/2 , in which A is a positive constant, U is…

A: a. Using the given relation, S=AN1/4V1/4U1/2U1/2=SAN1/4V1/4U=S2A2NV…

Q: Which of the following processes does not involve a change in entropy?A. An electric heater raises…

A: Entropy change is the measure of change in thermal energy per unit temperature of the system.

Q: Part 1: Five thousand kilocalories (5000 kcal) of heat flows from a high temperature reservoir at…

A: Entropy change is related to the amount of heat transferred at a temperature T as, ∆S=∆QT∆Q is the…

Q: A heat engine operating between -10 degrees Celsius and 40 degrees Celsius achieves 50% of the ideal…

A: Hello. Since your question has multiple sub-parts, we will solve first three sub-parts for you. If…

Q: A refrigerator (located in a 22°C kitchen) removes heat from the cold compartment (at 3.4°C) at a…

A: Given data: Higher temperature, TH=220C=22+273 K=295 K Lower temperature, TL=3.40C=3.4+273 K=276.4 K…

Q: A certain coal-fired power plant has a rated power capacity of P = 850 MW. The output of this plant…

A: Given that :- Power capacity , P=850 MW  Output , W=0.26Q11

Q: An engineer designs a heat engine using flat-plate solar collectors. The collector deliver heat at…

A: Temperature of hot reservoir T1=720C Temperature of cold reservoir T2=330C

Q: During one complete cycle of a heat engine process, which of the following quantities is nonzero?…

A: The correct option is (c). The work done.

Q: Question B2i. Give an equation for the infinitesimal change in entropy, ??, of a system in terms of…

A: The objective of the first part of the question is to provide the equation for the infinitesimal…

Q: Р (Рa) 800 600 400 A C 200 2 8 10 v (m) 4 6 le of an ideal gas is taken through a closed cycle…

A: Given:

Q: a. b. 4. Based on the first law of thermodynamics, which of the following is wrong? The sum of the…

A: First law of thermodynamics state that Energy can neither be created nor be destroyed. Which can…

Q: 86. D A lawnmower engine with an efficiency of 0.22 rejects 9900 J of heat every second. What is the…

A: Given data The efficiency of the engine is given as η=0.22. The heat rejected is given as Q = 9900…