Which of the following statements is incorrect?   Heat flows from a system into the surroundings in an endothermic process Internal energy is a state function The value of q is positive in an endothermic process The value of q is positive when heat flows into a system from the surroundings   Enthalpy is a state function

Q: A change in a system occurs such that 92.1 J of heat flows in to the system and 31.8 J of work is…

A: From the first law of thermodynamics, ∆U = Q - W where, ∆U = change in internal energy  Q = heat…

Q: in a chemical reaction experiment using calorimeter, which is the system and which is the…

A: System:System refers to the the particular area of the universe that is being studied or measured…

Q: A mixture of gases undergoes a chemical reaction inside of a container with a movable piston. The…

A: Here the heat is releases means it will be having a negative sign as q= -243KJ And here work is done…

Q: A 40.0 g sample of an unknown metal at 99.0 °C was placed in a constant-pressure calorimeter…

A: According to thermodynamics, the heat released by the hot metal equals the heat absorbed by the…

Q: What is the change in internal energy of the system   (ΔU)  if   50 kJ   of heat energy is released…

A: Given - Heat energy released (q)= 50KJ              Work done by the system (w)= 40KJ   We have to…

Q: internal energy of the system is expected to increase/ decrease Sign and symbol Heat (q) is…

A: We need to determine change in internal energy when heat is given, taken, work is done, work is…

Q: A chemical reaction in a bomb calorimeter produces 5.17 kJ of heat. If the heat capacity of the…

A:

Q: A sheet of gold weighing 9.3 g and at a temperature of 17.6°C is placed flat on a sheet of iron…

A: Given: mgold =9.3 g CAu = 0.129 J/g 0C Ti = 17.6 0C miron =21 g CFe = 0.444 J/g 0C Tiron = 55.3 0C…

Q: During a certain chemical reaction 270 J of heat is absorbed by the system and 500 J of work is done…

A: △U = q-w  ∆U = change in internal energy q = heat absorbed by the system w = work is done

Q: True or False? Because a state function depends on the current equilibrium of the system, a set of…

A: True.

Q: Select the correct definition for Hess' Law: The enthalpy change for an overall process will change…

A: Hess' law:-The enthalpy change for an overall process is equal to the sum of the enthalpy changes…

Q: In the laboratory a student burns a 1.13-g sample of dimethyl oxalate (C,H,04) in a bomb calorimeter…

A:

Q: the system is the substance undergoing the chemical or physical change, while the surroundings…

A: The statement is indeed true. In thermodynamics, the system is the part of the universe that is…

Q: A student mixes 41.8 g of ethanol at 15.8°C with 50.7 g of water at 49.2°C. If the resulting…

A: To find the answer, just compare the heat that ethanol gains to the heat that water loses. Water…

Q: Calorimeter Heat of the Calorimeter = Initial Temperature = Final Temperature =  Temperature…

A: The heat capacity of the calorimeter is the quantity of heat absorbed by the calorimeter for each…

Q: Measurements show that the enthalpy of a mixture of gaseous reactants increases by 391kJ during a…

A: According to the question,The enthalpy of a mixture of gaseous reactants is increased by ΔH = 391…

Q: Is enthalpy change an extenive or intensive property? What impact does this have on the quality of a…

A: The enthalpy of a system is nothing but the sum of internal energies of the system and its…

Q: A 240.0-g sample of water at 25.0°C is mixed with 120.9 g of a certain metal at 100.0°C. After…

A:

Q: Which of the following descriptions and/or equations best represent the enthalpy change of a system?…

A: Given statements,(A) The sum of the internal energy and the pressure-volume product of a system.(B)…

Q: Which one of the following conditions would always result in an increase in the internal energy of a…

A: Internal energy is defined as the energy associated with the random, disordered motion of molecules.…

Q: When a solid dissolves in water, heat may be evolved or absorbed. The heat of dissolution…

A:

Q: An electric heater supplies energy to a 25.0 g block of Al. The temperature was originally 22.8 °C…

A:

Q: A 2.62E1 g sample of aluminum at 1.008E2 °C is added to 1.002E2 g of water at 2.22E1 °C in a…

A: For a chemical reaction or physical process to occur a certain amount of energy should be furnished…

Q: Which of the following makes sense: When volume of a system is under constant pressure, which of…

A: The enthalpy change is defined as the internal energy change plus product of constant pressure and…

Q: A sheet of gold weighing 9.3 g and at a temperature of 15.2°C is placed flat on a sheet of iron…

A: Since both the metals are in contact  hence the heat will transfer from the hot sheet to cold sheet…

Q: A change in a system occurs such that 76.2 J of heat flows in to the system and 66.5 J of work is…

A: Introduction: From the 1st law thermodynamics,  the change in internal energy, ∆U = q + w (q =…

Q: An unknown substance has a mass of 0.125 kg and an initial temperature of 92.0°C. The substance is…

A:

Q: Determine the internal energy change if 718 J of heat are transferred to the system and 437 J of…

A:

Q: A piece of iron (mass = 25.0 g) at 398 K is placed in a styrofoam coffee cup containing 25.0 mL of…

A: Given,Mass of iron (m1) = 25 gInitial temperature of iron (Ti) = 398 KSpecific heat capacity of iron…

Q: For the following situation, the system and surroundings are defined for you. Determine whether the…

A: Statement given in the question:Placing your hand in a bowl of cold water

Q: None

A: Enthalpy Change Calculation:Enthalpy change (ΔH) is the sum of the energy change (ΔE) and the work…

Q: In endothermic reactions, heat is being absorbed and the internal energy of the system is…

A: Answer:Here:

Q: GIVE AN EXAMPLE OF THESE three types of systems: ~open system- a system that can exchange mass and…

A: Open system- a system that can exchange mass andthe energy with its surroundings Example: A cup of…

Q: What is the final temperature (in K) of 2.630 g of water with an initial temperature of 293.2 K…

A: Given: The initial temperature of the water, (T1) = 293.2 K. The mass of water, (m) = 2.630 g The…

Q: An ideal gas is enclosed in a piston-cylinder apparatus with the piston being freely movable. Given…

A: Given process,         ΔE is positive and ΔH is negative.

Q: Calculate the molar enthalpy for dissolving 25 g of NaCl in 100g of water inside a calorimeter. The…

A: Given: The mass of NaCl = 25 g The mass of water taken = 100 g The calorimeter heat capacity = 500…