m = 0.593 kg of methanol in atmospheric pressure is heated with an electric heater from T₁ = 30.2 °C to its boiling point. After the heating my methanol is vaporized. Heating and vaporizing takes t = 450.41 s with n=0.59 heater's efficiency. What is the volume of methanol? V = m³ Your last answer was interpreted as follows: 1 What is the energy required for heating? Eh = kJ Your last answer was interpreted as follows: 1 What is the energy required for vaporizing? E = Your last answer was interpreted as follows: 1 0.3 kg of the
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- A certain coal-fired power plant has a rated power capacity of P = 850 MW. The output of this plant is W = 0.26QH, where QH is the energy input as heat from the hot reservoir. a. If the power plant operates for a full day at its rated capacity, how much energy QH in MJ is needed? b. If, on average, one ton of coal contains Q = 25 GJ of energy, how many tons nH of coal would the plant need to operate for a day at its rated capacity? c. How many tons nC of this coal is exhausted as wasted heat to QC in a single day?The heat engine shown in the figure uses 2.0 mol of a monatomic gas as the working substance. (Figure 1) Figure p (kPa) 600 400 200 0 0 0.025 0.050 V (m³) 1 of 1 Part A Determine T₁, T₂, and T3- Enter your answers numerically separated by commas. Express your answer using two significant figures. T₁, T2, T3 = 600,1800, 1200 K Submit Previous Answers ✓ Correct Part B Determine AEth, Ws, and Q for 1→2. Enter your answers numerically separated by commas. Express your answer using two significant figures. IVE ΑΣΦ AEth, Ws, Q = 30000, 12500, 42500 Submit Previous Answers Request Answer ? J X Incorrect; Try Again; 4 attempts remaining Term 2: Review your calculations and make sure you round to 2 significant figures in the last step.A quantity of gas in a piston cylinder has a volume of 0.518m ^ 3 and pressure of 200 Pa. The piston Compress the gas to 0.294 m^3 in an isothermal process. what is final pressure of the gas?
- thermodynami. P (Pa) A 900 в 600 300 2 V (m) 4 6 2. One mole of a monatomic ideal gas is taken from state A to state B isobarically. a. How much work is done on the gas during the process A→B? b. What is the change in internal energy UA- UB? c. Is heat added or removed from the gas during the process A→B? d. How much heat is added or removed from the gas? The state of the gas is changed from B>C where the pressure drops to 300 Pa without any change in volume and after the gas is compressed to point A isothermally. e. On the diagram below show the complete cycle A→B→C→A. P (Pa) A 900 B 600 300 2 4 V (m³) b a V 3 An ideal gas can be taken from state a to state c in three different paths: a- har P.Please answer the following and show the complete solution: ANSWERS: a. 3000J b. 1000JA cylinder filled with ideal gas has a piston of mass M=5kg and area A=10 cm?. The cylinder has a valve located at the bottom. The valve was initially opened and some of the gas escapes slowly. The valve is then closed, after which the piston is observed to be at a lower position. Assume that the system is in thermal equilibrium with the surroundings and the piston is allowed to move freely during the whole process. 1. What was the initial absolute pressure of the ideal gas before the valve was opened? Is the final pressure of the gas in the cylinder greater than, less than, or equal to the initial pressure? Explain. Explain how your answer is consistent with the forces acting on the piston in the initial and final states.
- In performing 154.0 J of work, an engine exhausts 65.0 J of heat. What is the efficiency of the engine? e = 29I need solutions DA power plant has been proposed that would make use of the temperature gradient in the ocean. They system is to operate between 24.0°C (surface water temperature) and 4.95°C (water temperature at a depth of about 1 km). a. What is the maximum efficiency of such a system? Describe the process that would be used to get this maximum efficiency. b. If the useful power output of the plant is 80.0 MW, how much energy is absorbed per hour?
- Can you help 2a and subpart 2b 1. A certain power plant produces useful work (i.e. electricity) at a rate of 900 MW (remember, that's 900 x 106 joules/sec). How many joules of electricity does this power plant produce in 24 hours? 2a. To generate this amount of electricity, the power plant uses 2.22 x 1014 J of heat drawn from burning coal. What is the efficiency of this power plant? 2b. How much waste heat, Qc, does this power plant eject into its cold reservoir in 24 hoursA certain heat engine does 12.0 kJ of work and 8.50 kJ heat transfer occurs to the environment in a cyclical process. a. What was the heat transfer (in kJ) into this engine? b. What was the engine's efficiency (in percent)?An aircraft engine takes in 8900 JJ of heat and discards 6700 JJ each cycle. Part A. What is the mechanical work output of the engine during one cycle? Part B. What is the thermal efficiency of the engine? Express your answer as a percentage.