As we all know that microwave oven while warming up the sample by providing enough energy to rotate the water molecules present in the sample. Can the change in the internal energy of a cup of water heated in a microwave oven be described as a state function? Can the heat produced be described as a state function?

Q: A 50.7 g sample of glass is put into a calorimeter (see sketch at right) that contains 300.0 g of…

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Q: If you had access to a thermometer, water of various temperatures, a scale and a calorimeter, devise…

A: Heat capacity is defined as heat required to raise the temperature of a substance by 1 oC. Its unit…

Q: Why can we measure only changes in enthalpy, not absolute enthalpy values?

A: Enthalpy is the sum of the system's internal energy and the product of its pressure and volume.…

Q: A 52.1 g sample of polystyrene is put into a calorimeter (see sketch at right) that contains 300.0 g…

A: In the process, the polystyrene will release the heat. The water will absorb the heat from the…

Q: which of the ff will always result in an endothermic process a. work done on the system, heaet…

A: As the reaction is endothermic means enthalpy of the reaction is positive. Means by the reaction,…

Q: If 46.1g of copper at 11.6 degrees is place in 85.0g of water at 72.4 degrees what is the final…

A: Heat loss is given by the formula           -q = mC∆T     Or      -q = mC(Tf - Ti)  Where,  q=…

Q: Why is measuring temperature important in determining whether a change in enthalpy is exothermic or…

A: Exothermic reactions are the reaction where heat energy is evolved during the reaction. However,…

Q: Consider a cold can of soft drink on a table in a warm room.  If the cold can of soft drink is the…

A: According to the first law of thermodynamics, the energy of the universe remains constant. For a…

Q: Duncan knows that it takes 36400 calcal of energy to heat a pint of water from room temperature to…

A: Given: Energy needed to heat a pint of water from room temperature = 36400 Cal Heating 0.900 pint of…

Q: A 55.8 g sample of glass is put into a calorimeter (see sketch at right) that contains 300.0 g of…

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Q: A pure sample of Substance S is put into an evacuated flask. The flask is then heated steadily and…

A: In the heating curve , each region specific a particular process.  So first we would specify each…

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: he energy density of a fuel is 64.36 kJ/g. A 63.61-g sample is burned in an apparatus with a…

A: Energy density= 64.36 kJ/g  Mass = 63.61 g  Energy(q) ) = 64.36 × 63.61    = 4093.9396 kJ  Energy…

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: thermometer A 52.8 g sample of quartz is put into a calorimeter (see sketch at right) that contains…

A: Given information:Mass of quartz = 52.8 gMass of water = 250.0 gInitial temperature of a quartz =…

Q: A solid-state substance absorbs 5589kJ of energy. The mass of the substance is 0.774kg. Assuming the…

A: To solve this problem we will use the formula Q = m•C•∆T  Where, Q = heat absorbed  m = mass of…

Q: A 58.1 g sample of quartz is put into a calorimeter (see sketch at right) that contains 300.0 g of…

A: Answer:According to law of conservation of energy, energy can't be destroyed or created, it can only…

Q: thermometer A 57.7 g sample of glass is put into a calorimeter (see sketch at right) that contains…

A: Heat released by the sample of glass is equal to heat absorbed by water  Heat released by glass  =…

Q: For an exothermic reaction, how is the measured temperature change affected if some of the heat…

A: The amount of heat involved in a chemical of physical process is measured using the device called…

Q: How do I find heat absorbed by a calorimeter alone, and also heat absorbed by the conents of the…

A: The amount of heat or energy released or gained during the process is measured by using calorimeter.

Q: Describe the forms and types of energy, and apply the principles of energy to chemical bonds and…

A: All organisms use different forms of energy to power the biological processes to grow and survive.

Q: thermometer. A 59.8 g sample of quartz is put into a calorimeter (see sketch at right) that contains…

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Q: 1. Heat and work are called state functions. 2. Heat is manifested by an effect in the…

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Q: What is molar enthalpy?

A: Given, define molar enthalpy.

Q: Which of the following is incorrect?   A. Energy can be converted from one form to another but…

A: Thermal equilibrium is the state or condition wherein the temperatures of the elements in a system…

Q: A 58.5 g sample of iron is put into a calorimeter (see sketch at right) that contains 150.0 g of…

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Q: ermined that 52.4 kJ of work is done by the mixture during the reaction.  What is the correct change…

A: According to first law of thermodynamics, the total energy of system is conserved.∆U=q+w∆U=change in…

Q: A 50.5 g sample of glass is put into a calorimeter (see sketch at right) that contains 150.0 g of…

A: Answer: This question is based on the conservation of heat. When two objects are brought in contact…

Q: Consider a substance with a heat of solution (AHon) of -16.7 kJ/mol. 0.00100 mol of this substance…

A: The amount of heat released on dissolution of one mole of the solute in water is equal to 16700 J…

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: Is the total enthalpy (H) of the reactants more than or less than the total enthalpy of the products…

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Q: If 2.0 KJ of heat energy raises the temperature of a calorimeter containing 45.0 g of water from…

A: 2.0 KJ of heat energy raises the temperature of a calorimeter containing 45.0 g of waterfrom 23.0°C…

Q: Determine the enthalpy change in the following equation: 2 NH3(g) → N2(g) + 3 H2(g) AH°f NH3(g)…

A: Chemical equation for the formation of ammonia: 1/2N2  +  3/2H2  ----->  NH3   ∆Hof = -46.11…

Q: A 54.3 g sample of quartz is put into a calorimeter (see sketch at right) that contains 250.0 g of…

A: Given: Mass of sample of quartz =54.6 g Mass of water = 250.0 g Initial temperature of quartz sample…

Q: A 50.8 g sample of brass is put into a calorimeter (see sketch at right) that contains 200.0 g of…

A: Given that: Mass of brass sample = 50.8g Mass of water = 200.0g Initial temperature of brass =…

Q: energy

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Q: To a sample of water at 25.8°C in a constant-pressure calorimeter of negligible heat capacity is…

A: The amount of heat released by 14.2 g of Al can be determined as: Qreleased = mAl ×  sAl  ×…

Q: A 50.5 g sample of polystyrene is put into a calorimeter (see sketch at right) that contains 200.0 g…

A: Given: Mass of polystyrene = 50.5 g = mpTi of polystyrene = 85.4 ◦C = TpSpecific heat of polystyrene…