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For Questions 12 through 17, give a specific example of a process that has the energy changes and transfers described. (For example, if the question states “
∆Eth > 0, Q = 0
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- 27 J of heat energy is transferred into an ideal gas and 46 J of work is done on the gas. What is the change in thermal energy, in Joules? Your answer needs to have 2 significant figures, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the question statement.arrow_forwardProblem 11: A heat engine receives heat in the amount of Q, = 750 kJ from a high temperature thermal reservoir and delivers = 270 kJ of work per cycle. W. net Part (a) Write an expression for the efficiency of the engine. Expression : Select from the variables below to write your expression. Note that all variables may not be required. a, ß, 0, a, d, g, h, j, k, m, P, Qħ, S, t, W, net Part (b) What is this efficiency? Numeric : A numeric value is expected and not an expression. Part (c) Write an expression for the amount of energy required to be rejected into the low temperature reservoir. Expression : ttps://usu34ny.theexpertta.com/Common/ViewAssignmentDetails.aspx 26/2020 The Expert TA | Human-like Grading, Automated! Select from the variables below to write your expression. Note that all variables may not be required. a, ß, 0, a, d, g, h, j, k, m, P, Qh, S, t, Wnet Part (d) How much energy, in kilojoules, is rejected into the low temperature resevoir? Numeric : A numeric value is…arrow_forwardThe heat supplied is 500 J. The heat loss to the environment is 160 J. Step 2 Calculation: Write the expression for the work output from the heat engine. W=Q1-Q2 Here, W is the useful workout, Q1 is the supplied heat, and Q2 is the heat loss. Substitute, all known values in the above expression. W=400 J-160 J=240 J Thus, the useful work is 240 J. What is the efficiency of the heat engine in the preceding problem at top? a) 32% b) 54% c) 68%. d) 75% e) 175%arrow_forward
- Physics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage Learning