In the design of an experiment to the measure the heat change of a chemical reaction in an aqueous solution we make the following assumptions:  (1) we assume our calorimeter is a perfect insulator and no heat is transfered to the surroundings and (2) we assume that negligible heat is absorbed by the calorimeter.  We could write the following equation representing the relationship between the heat changes in our system. qsystem = qcalorimeter + qreaction + qsolution Considering the design of the experiment, in the above equation which heat changes would we assume are equal to zero?

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

A: Mas of KSCN = 4.00 g heat capacity = 3.83 kJ⋅K−1 change in temperature = 0.260 K

Q: 1. Consider the reaction in which methane CH4(g) is reacts with O2(g) to form CO₂(g) and H₂O(g).…

A: In the given reaction methane CH4 (g) is reacts with O2 (g) to form CO2 (g) and H2O (g)

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

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Q: A system does 551 kJ of work and loses 236 kJ of heat to the surroundings. What is the change in…

A:

Q: An automobile engine provides 638 Joules of work to push the pistons and generates 2293 Joules of…

A: Given- Work done (W) = 638 J Heat (Q)= 2293 J To find - ∆E in joules Formula - ∆E = Q + W

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: A generic solid, X, has a molar mass of 76.0 g/mol. In a constant‑pressure calorimeter, 37.7 g of X…

A: Solution:-

Q: If a system has 375 kcal of work done to it, and releases 5.00 x 102 kJ of heat into its…

A: Answer:Here:

Q: A calorimeter initially contains 165.0 mL of water at 21.3oC. When 2.72 g K is added to the water,…

A: Working formula Q = m×s×∆T m = mass of water; s = specific heat of water; ∆T = temperature change of…

Q: A system does 521 kJ of work and loses 216 kJ of heat to the surroundings. What is the change in…

A: The objective of the question is to calculate the change in internal energy (ΔE) of a system that…

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

A: Calculate the number of moles of xanthone. nxanthone = WxanthoneMxanthonenxanthone = 0.517 g196…

Q: Suppose 100.0 mL of 1.00 M HCl and 100.0 mL of 1.00 M NaOH, both initially at 25.0°C, are mixed in a…

A: The question is based on the concept of specific heat capacity.It is defined as the amount of heat…

Q: The energy lost or gained by a chemical reaction is measured by the reaction's enthalpy change. The…

A:

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…

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A: The energy difference between the products and reactants is known as the energy change of a…

Q: Air in an inflated balloon (system) is cooled and loses 203. J of heat. The surroundings also…

A: Given that, A system looses 203.0 J of heat. The work is done by the surroundings is 79.8 J. Which…

Q: What is the change in internal energy, ΔE, of the system? Note that internal energy is symbolized as…

A: According to first law of thermodynamic, The total internal energy is

Q: heat for the combustion of sucrose (table sugar, C12H22O11) is -5,647 kJ for

A: Number of moles = mass/ molar mass  Number of moles of O2 = mass of O2/molar mass of O2

Q: A constant pressure calorimeter is calibrated by mixing two aqueous solutions each with a volume…

A: Answer: In this question with the help of first reaction we have to calculate calorimeter constant…

Q: An automobile engine provides 510 Joules of work to push the pistons and generates 2202 Joules of…

A:

Q: AE=

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Q: How much heat was absorbed by the solution?

A: For constant pressure calorimeter, we know that The heat absorbed by the calorimeter is given by…

Q: An automobile engine provides 553 Joules of work to push the pistons and generates 2294 Joules of…

A:

Q: Use the References to access important values if needed for this question. An automobile engine…

A: According to firsta Law of thermodynamic we know that ∆U = q + w ∆U = change in internal energyq…

Q: 2. To study the possible amount of energy generated by a person, the person can be roughly viewed as…

A:

Q: 26 kJ of work and loses 216 kJ of heat to the surroundings. ge in internal energy, AE, of the…

A: First law of thermodynamics is based on conservation of energy

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

A:

Q: ) If a gas absorbs 2.0 J of heat from the surroundings and then performs 15.2 J of work, what is the…

A: • The values provided in the question are:-       i) Quantity of heat absorbed by the gas, Q = 2.0 J…

Q: What is the change in internal energy of the system (AU) if 71 kJ of heat energy is absorbed by the…

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Q: Many portable gas heaters and grills use propane, C3 Hs (g). Using enthalpies of formation,…

A:

Q: A 2.59 g sample of a substance suspected of being pure gold (Cs = 0.128 J g−1°C−1) is warmed to 81.3…

A: The objective of this question is to determine the heat capacity of an unknown substance, suspected…

Q: When a 7.00 g sample of RbBr is dissolved in water in a calorimeter that has a total heat capacity…

A:

Q: A system absorbs 1.66E2 kJ of heat and the surroundings do 1.032E2 kJ of work on the system. What is…

A: We have to predict the change in internal energy of system.

Q: In the laboratory a student burns a 0.983-g sample of glutaric acid (C;HgO4) in a bomb calorimete…

A: Given that: Mass of glutaric acid = 0.983 gMass of water = 1170 gChange in temperature, ∆T = 26.90oC…

Q: A system gains 727 kJ727 kJ of heat, resulting in a change in internal energy of the system equal to…

A: As we know; deltaU = Q + W  where delta U is change in internal energy  Q = heat produced  W =…

Q: The heat capacity of a substance can be obtained by multiplying its mass by its specific heat.…

A: The objective of the question is to determine the units in which the heat capacity of a substance is…

Q: chemical reaction requires 369.42 kJ of heat and performs 73.7 kJ of work on the surroundings. What…

A:

Q: A gas expands and does P-V work on the surroundings equal to 284 J. At the same time, it absorbs 201…

A: Given  Work done by the system on surrounding = 284 Joule  Heat absorb                  = 201 Joule…