A certain heat engine operates between 50 ° C and 130 ° C. (a) Calculate the maximum work that can be done for each 2.0 kJ of heat supplied by the hot source. (b) How much heat is discharged into the cold sink in a reversible process for each 2.0 kJ supplied by the hot source? (c) To increase the theoretical efficiency by 5 %, to what temperature would the hot source have to be raised if the temperature of the cold source were constant?

Q: calculate w for the engine.

A:

Q: Two substances A and B, initially at different temperatures, arethermally isolated from their…

A: The relationship between the quantity of the heat absorbed/released in a system and the change in…

Q: A certain gas expands in volume from 2.0L to 24.5L at a constant temperature. Calulate the work done…

A:

Q: Calculate the work done when an open beaker containing 50 g of iron reacts with hydrochloric acid to…

A: The solution of your question is given below -

Q: For the following processes, calculate the change in internalenergy of the system and determine…

A: Given data is as follows: Work done on the balloon, w = 382 J Amount of heat removed from balloon, q…

Q: A battery harnesses a chemical reaction to extract energy in the form of useful electrical work. (a)…

A:

Q: Indicate which of the following is independent of the pathby which a change occurs: (a) the change…

A: Indicate which of the following is independent of the path by which a change occurs .

Q: Calculate the molar heat capacity of iron in J·mol-1·°C-1. Its specific heat is 0.4498 J·g-1·°C-1.

A:

Q: The change in internal energy for the combustion of 1.0 mol of octane at a pressure of 1.0 atm is…

A:

Q: For the reaction 2NH3(g) + 202(g)¬N20(g) + 3H,0@) AH° = -683.1 kJ and AS° = -365.6 J/K The maximum…

A: The thermodynamic equation of energy is shown below: Where; ∆H= change in enthalpy T= temperature…

Q: A sample consisting of 1.0 mol CaCO3(s) was heated to 800 °C, at which temperature the solid…

A: SOLUTION: Step 1: The reaction of decomposition of calcium carbonate is as follows: CaCO3 (s) → CaO…

Q: a) Methane gas allowed to expand from a volume of 3.2 L to a volume of 8.5 L. During the course of…

A: It is given that methane gas is expanding from a volume of 3.2 L to a volume of 8.5 L, and during…

Q: When 1 mol of a gas burns at constant pressure, it produces2418 J of heat and does 5 J of work.…

A: When a gas burns at constant pressure we have P = constant. So, Pext = P of the gas container We…

Q: When a 4.00 g sample of RbBr is dissolved in water in a calorimeter that has a total heat capacity…

A:

Q: The table provides molar heat capacities (Cm) of selected Molar heat capacity (Cm) of selected…

A: Given Molar heat capacity values [in J/(mol.K) units] including Magnesium To find Specific heat…

Q: The change in internal energy for the combustion of 1.0 mol of octane at a pressure of 1.0 atm is…

A: since, p is constant, q = delta H

Q: A sample consisting of 3.0 mol CaCO3 (s) was heated to 800 oC, at which temperature the solid…

A: Interpretation - Given a sample consisting of 3.0 mol CaCO3 (s) was heated to 800 oC, at which…

Q: A heat engine produces 2000 J of work while operating at temperatures ranging from 210 to 35 degrees…

A:

Q: A rubberized sphere contains carbon dioxide. If the initial radius of the sphere is 15cm: a. How…

A:

Q: A 50.0 g sample of white phosphorus is heated from 298 K to 350 K. If its molar heat capacity, Cp is…

A:

Q: Indicate which of the following is independent of the pathby which a change occurs: (a) the change…

A: (a) Potential Energy can be defined as the energy possessed by the object by virtue of its position,…

Q: Acetylene gas, C2H2(g), is used in welding. (a) Write abalanced equation for the combustion of…

A:

Q: 5.00 g of potassium hydroxide (molar mass = 56.1 g/mol) dissolves in 100.0 g of water and the…

A: The question can be solved by giveb formula,  Q=m×C×dT where Q = heat energy (Joules, J),  m = mass…

Q: Consider that you have a balloon containing 2.00 moles of CO and 1.00 mole of O2 which is in a room…

A: According to first law of thermodynamics , the work done by a system,is dW=-PdV.  Where dV be the…

Q: A 13.6 g metal block is warmed to 79.7°C and plunged into an insulated calorimeter containing 46.2 g…

A:

Q: The standard enthalpy of combustion of graphite is -393.51 kJmol-1, and the standard enthalpy of…

A: Thermodynamics is the branch of chemistry which deals with the study of heat and other forms of…

Q: Calculate the work, in J, if the volume of a system contracts from1.55 to 0.85 L at a constant…

A: Given: Pressure = 0.985 atm Initial volume Vinitial=1.55L Final volume Vfinal = 0.85L

Q: How much work, ?,w, must be done on a system to decrease its volume from 12.0 L to 4.0 L by exerting…

A: Formula used :-  W = -PdV  Where dV = (Vfinal - Vinitial )

Q: How much work (J ) is required to compress a gas from 10L to 7L by exerting a constant pressure of…

A: work done in thermodynamical process is  W = P(V2 - V1)

Q: For the reaction 2NO(g) + 2H2(g) N2(g) + 2H2O(1) AH° = -752.2 kJ and AS° = -351.6 J/K The maximum…

A:

Q: The change in internal energy for the combustion of 1.0 mol of octane at a pressure of 1.0 atm is…

A: Thermodynamic is the branch of chemistry that mainly deals with the heat transfer between system and…

Q: Identify the false statement below: A) In reactions where solids are transformed into gases, the…

A: A) Since work done is given by  W = -PΔV where P = constant pressure  W = work  And ΔV = change in…

Q: onsider that you have a balloon containing 2.00 moles of CO and 1.00 mole of O2 which is in a room…

A: Moles of CO = 2 moles Moles of O2 = 1 mole Temperature = 25.9 ◦C OR (273.15 + 25.9) K Pressure = 1…

Q: What mass of silver is required to raise the temperature of silver from 156.0ºC  to 623ºC if 5012 J…

A: Formula used  Q = mCdT where Q = heat  m = mass , C = heat capacity dT = change in temperature

Q: 1.) When determining the heat capacity of the unknown metal we assumed the heat capacity of the…

A: When determining the heat capacity of the unknown metal we assumed the heat capacity of the water…

Q: 18. The combustion of propane is shown by the following equation: C,H;(g) + 50,(g) → 3CO,(g) +…

A:

Q: The table provides molar heat capacities (Cm) of selected metals with the units of joules per…

A: • The values provided in the question are:-  i) Molar heat capacity of Nickel , Cm = 26.07 J/(mol•K)…

Q: Copper has been used for thousands of years, either as a pure metal or in alloys. It is frequently…

A: Energy to recycle is 1.40 mol Cu  Step 1: CuO(s) to Cu(s) q1=1.40*155 = 217 kJ   Step 2: Cu(s) at 25…

Q: Three moles of an ideal gas are compressed from 5.5 × 102 to 2.5 × 102 m3 . During the…

A: in isothermal process temperature is constant throughout the process.

Q: One mole of an ideal gas is contained in a cylinder with a movable piston. The temperature is…

A: T = 78°CP1 = 5.20 atmP2 = 2.53 atmP3 = 1.00 atmWhat is the total work (in joules) in going to the…

Q: A heat engine operates between a hot source at 130.°C and a cold sink at 10.°C. How much work can be…

A: For carnot cycle, efficient is related to temperatures of hot source and cold sink

Q: electrical work, delivers 274.0 Joules of expansion work, and absorbs 168.0 Joules of heat. How many…

A: From first law of thermodynamics,  □E = q + w Where, □E = change in interanal energy  q = heat w =…

Q: work

A:

Q: A sample consisting of 1.0 mol CaCO_3 (s) was heated to 800 degrees C, when it decomposed. The…

A: During the decomposition of calcium carbonate, carbon dioxide gas is evolved. The carbon dioxide gas…