If the reaction of 2.5 g of Ca transfers 487 J of heat to a solution in a calorimeter (i.e. qsoln = + 487 J), determine Δ r H.

Q: A student burns a 0.452 g sample of naphthalene, C10H8, in a bomb calorimeter. The combustion…

A: Given: Mass of naphthalene i.e C10H8 burned = 0.452 g Change in temperature of calorimeter = 2.961…

Q: What is the specific heat capacity of an unknown material that has a mass of 81 grams and that…

A: The given data contains, mass = 81 g. heat = 2702 J.

Q: How much heat evolves from burning 16.4 g of sulfur, Sg, in air? g S8(s) + 8 O2(g) → 8 SO2(g) AH°r=…

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Q: What is the change in the internal energy of a system that absorbs 2,500 J of heat and that does…

A: The given data contains, A System absorbs 2500 J of heat work =7655 J

Q: What is the specific heat capacity of a metal if it requires 269.6 J to change the temperature of…

A: q=ms∆T Putting these values.

Q: If a student performs an endothermic reaction in a calorimeter, how does the calculated value of ∆H…

A: An endothermic reaction is the one that takes in energy, overall.

Q: A gas expands and does PV work on the surroundings equal to 325 J. At the same time, it absorbs 127…

A: Given  Work done by the system on surrounding = 325 Joule  Heat absorbed = 127 Joule  Change in…

Q: C 2H 5OH() + 30 2( g)→ 2CO 2( g) + 3H 20( ) AH=-1.37 x 10 3 kJ I. The reaction is endothermic II.…

A: Exothermic reaction is the reaction in which energy is released in the formation of products while…

Q: Suppose we have a closed, un-isolated system. When 483 J of heat was introduced to the system, it…

A: Internal energy is a state function. The symbol used for internal energy is U. The unit used for the…

Q: Calculate the value of ΔE for a system that loses 50 J of heat and has 150 J of work performed on it…

A: Given: The system loses 50 J of heat. And the work done on the system = 150 J.

Q: Consider the following reaction equation of combustion of glucose, C6H12O6: a. Calculate the…

A: Mass of Glucose = 5.25 g C6H12O6 (s) + 6O2(g) ------> 6CO2(g) + 6H2O(g)

Q: A gas expands and does work on the surroundings equal to 279 J. At the same time, it absorbs 216 J…

A: Note : Since you have posted multiple questions, we are entitled to answer the first only. Please…

Q: What is the internal energy of a system that has 45.2 J of work done to it and releases 74.6 J of…

A: Given, work done on system ,W = 45.2 J Heat released from system to sorroundings, q  = 74.6 J

Q: Consider the reaction: C,H,OH) + 30, (g) →2CO,(g)+3H,01), AH = -1.37 x 10° kJ When a 21.1-g sample…

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Q: A gas does 135 J of work while expanding and, at the same time, absorbs 156 J of heat. What is its…

A: Given :-  heat absorbed by system = 156 J  work done by gas = 135 J To calculate :- ∆U(in J)

Q: Consider a reaction occuring in a calorimeter. The heat produced by this reaction is symbolized by…

A: A calorimeter is used for measuring the heat of a chemical reaction. In calorimeter, an exothermic…

Q: When 1.23g C6H6(l) are burned, 51.5KJ of heat are released.  Calculate the enthalpy for this…

A: Heat of formation of the compound can be calculated from the reaction and enthalpy of the reaction .…

Q: What is the change in internal energy (in J) of a system thatabsorbs 0.615 kJ of heat from its…

A: The relation between change in energy, heat, and work is given as: ∆E=q+w

Q: If the complete reaction of 45.0 g of B(s) requires 74.93 kJ of heat to be absorbed from the…

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Q: When 15.3 g of sodium nitrate was dissolved in water in a calorimeter, the temperature fell from…

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Q: The specific heat of water is 4.18 J (g x Celcius). Calculate the molar heat capacity of water.

A: Specific heat of water is 4.18 J / g 0C. That means amounts of heat required by 1 mol of water to…

Q: A sample of tin experiences a cemperature change of +60.8 PC while absorbing 672.1 joules of heat.…

A: Specific heat capacity is amount of heat needed to increase the temperature of one gram of substance…

Q: What is the change in internal energy for a system that performs 213 kJ of work on its surroundings…

A: Given, System performs 213 KJ of work on its surrounding And system loses 79 KJ of heat in the…

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: 2. The work done when a gas expands in a cylinder is 264 J. During the process, there is a heat…

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Q: 4-A system suffers an increase in internal energy of 80 J and at the same time has 50 J of work done…

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Q: If 800 J of heat is added to a system when it does 500 J of work, what is the change in internal…

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Q: What is the change in energy (in J) for a system that lost 344 J of heat to the surroundings, and…

A: Assume that work (w) is done on the system, so w will be positive.Given:Heat lost, Q  = - 344 JWork…

Q: The work done to compress a gas is 122 J. As a result, 31 J of heat is given off to the…

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Q: The addition of 3.15 g of Ba(OH)2 · 8H2O to a solution of 1.52 g of NH4SCN in 100 g of water in a…

A: As per our guidelines we can only solve first question. Please resubmit the other questions as next…

Q: If the water in a coffee cup calorimeter absorbed 300 J of energy (q = +300 J) during a reaction…

A: Energy absorbed by water in coffee cup calorimeter = 300 J qwater = + 300 J

Q: 1. Find the change in the internal energy when 175 J of work is done on a system that evolves 50 J…

A: Given:Heat (q) = 50 J        Work (W) = 175 J since, work is done on the system which means energy…

Q: Is the change in enthalpy for a reaction an extensive property? Explain the relationship between ΔH…

A: The enthalpy of the reaction is considered as the state function that is it depends only on the…

Q: What is the AE of a system if 184 kJ of work is done on the system and it loses 267 kJ of heat?

A: We use the first law of thermodynamic for calculating the change in internal energy. This low state…

Q: 1)What is the specific heat if 24.8 g of a metal absorbs 275 J of energy and the temperature rises…

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Q: 2. What is the work done by a system whenabsorbs 47 J of heat and gain 12 J of energy?

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Q: Unit 10 Q#17 When a 25.0 g sample of ethyl alcohol is burned, how much energy is released as heat?…

A: Given: Mass of Ethyl alcohol = 25 g ∆Hrxn = -1.37 × 103 KJ/mol That means on burning 1 mole of…

Q: (SHOW CALCULATIONS) A system delivers 1525 J of heat while the surroundings perform 860 of work on…

A: Given : Heat delivers by system = 1525 J  Work performed by surrounding on system = 860 J

Q: 2NO(g) + 02(g)–2NO2(g) Based on this value and the standard enthalpies of formation for the other…

A: Given  2NO (g) + O2 (g) ---> 2 NO2 (g)  ∆H rxn = -112.0 KJ  ∆H°f (NO2) = ?

Q: A chemist carefully measures the amount of heat needed to raise the temperature of a 1.04 kg sample…

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Q: When 10.00 g of phosphorus is burned in O2( g) to form P4O10(s), enough heat is generated to raise…

A: Given; M = 10.0 g c = 4.2jgC ∆T = (38-18)oC

Q: What is the internal energy of the system that absorbs 90 J of heat and 15 J work done by the…

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Q: A gas expands and does work on the surroundings equal to 2.17 L atm. At the same time, it releases…

A: First law of thermodynamics It states that the internal energy of a system is equal to the heat…

Q: 10) For which of the following substances is AH°f, the enthalpy of formation, equal to zero? a)…

A: Standard enthalpy of formation for an element will be zero if the element is present/formed in their…

Q: If a student performs an endothermic reaction in a calorimeter, how does the calculated value of ΔH…

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Q: In an industrial process to produce ammonia (NH3); nitrogen, N2, reacts with hydrogen, H2, the…

A: Ammonia can be produced in an industry with the help of nitrogen and hydrogen gas, and this process…

Q: • Part A Chemical energy is released or absorbed from reactions in various forms. The most easily…

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Q: 1. A gas expands in volume and does P-V work on the surroundings equal to 325 J. At the same time,…

A: We have to use the below sign convention to find the sign of w and q When heat(q) is going out of…

Q: A chemist carefully measures the amount of heat needed to raise the temperature of a 0.88 kg sample…

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Q: If a system is given 60 J of heat and lifts the lid of the container 3 m with a force of 5 N, what…

A: Applying first law of thermodynamics and work done by system  ∆U = Q-w  &  W= F×r