Question 3 of 6 > A certain process yields 6.00 x 10 J of mechanical work...
A certain process yields 1.71 x 10% J of mechanical work for every 6.77 x 10 J of heat flow into the process. What is the thermal efficiency Nth of this process? Mth =
A certain process yields 695000 J of mechanical work for every 722000 J of heat flow into the process. What is the efficiency of this process? Number
6 Example 15-8, An engine has efficiency of 22% and produces 18000 J mechanical work at taking in a temperature heat of 810°. a) How much heat input is required, b) how much heat is discharged as waste and c) at what temperature does it spew heat (consider Carnot engine) (10 points)
Question 5 of 10 > The specific heat of a certain type of metal is 0.128 J/(8°C). What is the final temperature if 305 J of heat is added to 33.8 g of this metal, initially at 20.0°C? final =
HF QUESTION 4 If AH = 25 J for a certain process, that process O releases heat is exothermic. O is endothermic. can't tell 1 QUESTION 5 The sign of AH for the process Heat + 2H90 --> 2Hg + O 2 is negative, and the process is endothermic. positive, and the process is exothermic. positive, and the process is endothermic. negative, and the process is exothermic. QUESTION 6
In a certain process, a sample of gas does 950 J of work and releases 500 J of heat into the environment. What is the resulting change of the internal energy ∆E of the gas sample in this process? (A) −1450 J (B) +1450 J (C) +450 J (D) −450 J (E) −500 J
Question 3 of 8 > The specific heat of a certain type of metal is 0.128 J/(g:'C). What is the final temperature if 305 J of heat is added to 42.7 g of this metal, initially at 20.0°C? Tiinal =
< Question 3 of 6 306 > ) How many picograms are in 6.39 x 10-"g? 6.39 x 10-11 How many micrometers are in 2.85 x 10m ? 2.85 x 10-5 m How many kilovolts are in 1.90 x 10' V? 1.90 x 10 V- How many nanoliters are in 6. 6.77 x 10-19
The work done on an ideal gas is -5.41 x 10^6 J during a process in which the temperature remains constant at 323 C and the volume changes from 2.14 m3 to 7.28 m3? How many moles of the gas are there? Express your result to three significant digits and in scientific notation. Be careful with signs!
Question 19 of 23 > A certain weak base has a Kb of 8.70 x 10-7. What concentration of this base will produce a pH of 10.12? concentration: M