Q1a: What is the change in internal energy of a system (ΔU) if 5.42 kl of heat is absorbed by the system and 3425 J of work is done on the system (by the surroundings) for a certain process? Expess your answer in kJ 1b: A sample of oxygen gas (O₂) effuses into a vacuum 1.8 times faster than an unknown gas. What is the molecular weight of this unknown

Q: A 59.3 g sample of aluminum is put into a calorimeter (see sketch at right) that contains 100.0 g of…

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Q: at, how many gram of C12H26 wo

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Q: A chemist carefully measures the amount of heat needed to raise the temperature of a 1.63 kg sample…

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Q: 51.4g  sample of quartz is put into a calorimeter (see sketch at right) that contains  250.0g  of…

A: Quartz is a chemical compound that consists of one Silicon atom and  two Oxygen atoms  and its…

Q: Sulfur dioxide gas reacts with oxygen to form sulfur trioxide in an exothermic reaction according…

A: Enthalpy of a reaction is the energy that liberated or consumed in the chemical reaction. For an…

Q: The molar heat capacity of silver is 25.35 J/mol⋅∘C. How much energy would it take to raise the…

A: Recall the data, Molar heat capacity of silver=25.35Jmol °C mass of silver=9.00 g molar mass of…

Q: A 55.6 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 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 particular container holds 4.344.34 mol of neon gas. The volume of this container can be altered…

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Q: You fill the calorimeter with 55.5g of water at 16.5°C, heat the 15.5 g “silver” coin to 100.0°C,…

A: =15.5 × 0.240 ×(100-22) J =291.096 J

Q: A 53.6 g sample of glass, which has a specific heat capacity of 0.670 J-g¹C¹, is put into a…

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Q: A chemist carefully measures the amount of heat needed to raise the temperature of a 106.0 mg sample…

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Q: A 55.5g sample of brass, which has a specific heat capacity of 0.375·J·g−1°C−1, is put into a…

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Q: A bomb calorimeter, or a constant volume calorimeter, is a device often used to determine the heat…

A: Given, Mass of quinizarin - 0.6677 g. Temperature change(dT) - 26.86 oC to 29.43 oC =  Mass of water…

Q: The propane fuel (C3H8) used in gas barbeques burns according to the following thermochemical…

A: Answer:In this problem, by using the stoichiometry of thermochemical equation we have to convert the…

Q: A 58.5 g sample of quartz is put into a calorimeter (see sketch at right) that contains 250.0 g of…

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Q: An 80.0 g sample of a gas was heated from 25 °C to 225 °C. During this process, 346 J of work was…

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Q: A sample of ammonia goes through a temperature change of +39.63 °C while absorbing 603.9 joules of…

A: Given, Temperature change (∆T) = 39.63 °C Amount of heat absorbed (Q) = 603.9 J Specific heat…

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: A58.6g sample of iron is put into a calorimeter (see sketch at right) that contains 250.0g of water.…

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Q: V -1 A sample of brass, which has a specific heat capacity of 0.375 J-g¹ °C, is put into a…

A: Mass of water : 200gSpecific heat capacity of brass : 0.375j/(g°C)Specific heat capacity of water :…

Q: A chemist carefully measures the amount of heat needed to raise the temperature of a 860.0 mg sample…

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Q: A 56.8 g sample of polystyrene, which has a specific heat capacity of 1.880 J-g¹C¹, is put into a…

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Q: Nitromethane (CH3NO2), sometimes used as a fuel in drag racers, burns according to the following…

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Q: A researcher studying the nutritional value of a new candy places a 4.60 g4.60 g sample of the candy…

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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: a You want to determine the value for the enthalpy of formation of CaSO4(s). Ca(s) + S(s) + 2 O2(g)…

A: The objective of this question is to reaction involving calcium (Ca), sulfur (S), oxygen (O), and…

Q: Consider the hypothetical thermochemical equation 3A+B 2C for which AH = 84.3 kJ/mol. If you have…

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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: A 57.2g  sample of brass is put into a calorimeter (see sketch at right) that contains  250.0g  of…

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Q: A chemist carefully measures the amount of heat needed to raise the temperature of a 0.59 kg sample…

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Q: A 53.2 g sample of iron is put into a calorimeter (see sketch at right) that contains 250.0 g of…

A: Answer:- This question is answered by using the simple concept of calorimetry which states that heat…

Q: A 57.2g sample of brass is put into a calorimeter (see sketch at right) that contains 250.0g of…

A: we have to calculate the specific heat capacity of Brass

Q: The molar heat capacity of silver is 25.35 J/mol⋅∘CJ/mol⋅∘C. How much energy would it take to raise…

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Q: A 56.6 g sample of aluminum is put into a calorimeter (see sketch at right) that contains 250.0 g of…

A: Answer:- This question is answered by using the simple concept of calculation of specific heat…

Q: Chlorine Tri fluoride is a toxic intensely reactive gas.  It was used in WWII to make incendiary…

A: It is an exothermic reaction having ∆H as negative value and 1196 kJ of heat is evolved.

Q: A 52.7 g sample of aluminum is put into a calorimeter (see sketch at right) that contains 150.0 g of…

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Q: Having just invented a new type of calorimeter, Dr. Covey needs to determine the heat capacity of…

A: Us principle of carlorimetry to get answer heat flow from high temperature to low temperature. water…

Q: A gaseous fuel mixture contains 24.2% methane (CH4), 40.5% ethane (C₂H6) and the rest propane (C3H8)…

A: Given, Methane (CH4) = 24.2 %Ethane (C2H6) = 40.5 %Propane (C3H8)=35.3 %

Q: A 56.5 g sample of aluminum is put into a calorimeter (see sketch at right) that contains 100.0 g of…

A: Given, For aluminium mass of aluminum (maluminum) = 56.5 g Specific heat capacity of aluminium…

Q: researcher studying the nutritional value of a new candy places a 3.90 g3.90 g sample of the candy…

A: First calculate heat released by multiplying heat capacity and change in temperature convert joule…

Q: If 50.0 g H2O at 13.6 °C is combined with 244 g H2O at 93.7 °C, what is the final temperature of the…

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Q: A 60.0 g sample of iron is put into a calorimeter (see sketch at right) that contains 300.0 g of…

A: Here iron at higher temperature is placed in water at lower temperature, so iron will lose heat and…

Q: A 55.1g sample of polystyrene, which has a specific heat capacity of 1.880·J·g−1°C−1, is put into a…

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Q: combustion of fuels and the energy content of foods. In an experiment, a 0.6756 g sample of adipic…

A: Given, Mass of Acid = 0.6756 g Molar mass = 146 g/mol Mole(n) = 0.6756/146   = 0.00453 mol…

Q: A bomb calorimeter, or a constant volume calorimeter, is a device often used to determine the heat…

A: