A system releases 75 J of heat. And the same time 19 J of work is done on the system by the surroundings. What is the AU? -93 J O -39 J O 82 J O 11J O -56 J O - 25 J

Q: If 50.0 g of water at 25.0 °C absorbs 14.5 kJ of heat, what is the final temperature of the water?…

A: Given  q = 14.5 kJ = 14500 J C = 4.184 J/g.°C Ti = 25°C Tf = ?

Q: How many grams of water can be heated from 25.0 oC to 75oC using 12500.0 Joules?

A: Given, amount of heat =12500.0 Joulesinitial temperature =25 °Cfinal  temperature =75 °Cwe are asked…

Q: 6.111 In a calorimetric experiment, 6.48 g of lithium hy- droxide, LİOH, was dissolved in water. The…

A:

Q: What is AE for a system which has the following two steps: Step 1: The system releases 50 J of heat…

A: In thermodynamics work done on the gas has positive energy value where as work done by the gas has…

Q: The AE of a system that absorbs 252.4 J of heat and has 120.8 J of work done on it by the…

A: According to first law of thermodynamics  ∆E=Q-W where  Q = heat absorbed by system              W =…

Q: Which of the following (with specific heat capacity provided) would show the smallest temperature…

A:

Q: 8. 66.80 g of lead is heated to 155°C and then placed into a foam cup calorimeter containing 70.0 mL…

A: Given that  : Mass of lead (ml)= 66.80 g Temperature (Tl)= 1550C = 428 K Volume of water = 70.0 mL…

Q: long path acb, 100 J of heat flows into the system and the system does OJ of work. (a) How much heat…

A: The energy change during a process is always conserved. The internal energy is a state function; it…

Q: What is the internal energy of the system that releases 180 J of energy to the surroundings in the…

A:

Q: 1) The three combustion reactions are: C(s, gr) + O>(g) --> CO,(g) AH =-393.50 kJ H,(g) + ½0,(g)…

A: Solution:    The change in enthalpy of formation is the enthalpy change when the formation of one…

Q: What is the change in internal energy of the system (in J)?

A: From the first law of thermodynamic we know that ,     du=dq+dw where du = change in internal energy…

Q: 0.26g CH4 are burned and all the heat added to a silver cup with 90g H2O(l) inside. If the water was…

A: The combustion reaction of CH4 is => CH4 + 2 O2 --------> CO2 + 2 H2O Since the ΔH of reaction…

Q: A sample of gold absorbs 34.8 kJ of heat, resulting in a temperature rise of 65.0°C, determine the…

A:

Q: 20.0  J of heat is added to 10.00 g of gold, which is initially at 25°C. The heat capacity of gold…

A: Q = n . s . (T2 - T1) Where, Q = heat absorbed;  s = specific heat of substance; n = number of moles…

Q: An engineering student wants to study the heat transfer between a 50 g of a heated block of iron…

A:

Q: A sample of 24.9 g of ammonium nitrate, NH4N03, was dissolved in 121.3g of water in a coffee cup…

A: Mass of sample (ammonium nitrate) = 24.9 gram Mass of water = 121.3 gram Specific heat of solution =…

Q: reaction

A: Dear student this question is related to enthalpy change.

Q: Substance Specific Heat Capacity (in J/g x °C) Iron 0.449 Aluminum 0.897 Lead 0.129 4. Using the…

A: Given : Initial temperature of substance = 20 oC Final temperature of substance = 30 oC And equal…

Q: 1. How much heat must be added to a 38-g sample of aluminum to increase its temperature by 250.0°C?…

A:

Q: Mass of can (g) 12.62 Mass of can and water (g) 102.04 Initial mass of food sample (g) 1.92 Final…

A: Hi, as you have posted a question with multiple subparts and have not mentioned which subpart you…

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

A:

Q: 1. What is the mass of iron if 17.10 joules are added and the temperature moves from 15 oC to 28 oC?…

A:

Q: 10. Given the following thermochemical equation, calculate the heat involved in decomposing 12.5 g…

A:

Q: Zinc is primarily used to galvanize steel, a process that protects the metal against unwanted…

A: The heat required for a substance 'q' to alter the temperature ∆T is given by the equation, q=m×C×∆T…

Q: 6.00 J of heat is added to 10.00 g of gold, which is initially at 25°C The heat capacity of gold is…

A:

Q: A student heats 61.27 grams of silver to 97.71 °C and then drops it into a cup containing 82.16…

A:

Q: A system absorbs 140 J of heat from the surrounding and 85 J of work is done on the system by…

A: A system absorbs 140 J of heat from the surrounding and 85 J of work is done on the system by…

Q: 4) The specific heat of copper is 0.385 J/g °C. Using the heat equation, Heat = mass x temperature…

A:

Q: The specific heat capacity of copper metal is 0.385 J/g · K. How much energy is required to heat 205…

A: The energy required to heat a solid metal is given by  Q = mCΔT  where m = mass of metal  C =…

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

A: Given data,Mass of phthalic acid(mphthalic acid)=0.6715gMass of water(mH2O)=1.214×103gInitial…

Q: Question attached

A: Answer: Given: Volume of water = 40.0 mL Heat capacity of calorimeter = 650 J/oC Density of water =…

Q: Part A The specific heat capacity of sold copper metal is 0.385 JigK. How many joules of heat are…

A: Given, specific Heat of solid copper metal  = 0.385 J/gK Mass of block = 1.55 Kg = 1550 g  Initial…

Q: What is the heat capacity of 265 grams of water? The specific heat of water is 4.184 J/g °C. O 1105…

A:

Q: What is the change in internal energy of a system that has 682 J of work done on it and gives off…

A: Given w = + 682 J ( as work is done on the system) q = -485 J ( as heat is given off )

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: How many moles of natural gas (CH,) must burn to emit 273 kJ of heat? CH4(9) + 202(9) → CO2(9) +…

A:

Q: The heat of the solution of ammonium nitrate is 26.2 kJ/mol. If a 5.368 g sample of NH₄NO₃ is added…

A: Heat of the solution of ammonium nitrate = 26.2 kJ/mol Mass of ammonium nitrate = 5.368 g Volume of…

Q: A fuel was used to heat water in a calorimetry experiment. When butane was burnt, 96070.0 J of heat…

A: Ans is given below

Q: 2. An 88.5 gram piece of iron initially at 78.8°C is place in a beaker containing 244 grams of water…

A:

Q: If 3830 J of heat is added to a calorimeter containing 75.40 g of water, the temperature of the…

A:

Q: Classify as exothermic or endothermic CH4(g)  + 2 O2(g) + →  2 H2O(g) + CO2(g) + 889 kJ How do you…

A: When the reaction releases the heat then it is exo thermic and when it absorbs the heat then it is…

Q: Mass of can (g) 12.67 Mass of can and water (g) 108.88 Initial mass of food sample (g) 1.91 Final…

A: The heat gain by water is calculated using formula : q = m × C × dT  where, m = mass of water  C =…

Q: Consider the combustion of propane: C3 Hs (g) + 502(g) → 3CO2(g) + 4H2O(1) AH = -2221 kJ A balloon…

A: It is given that heat transfer process is 60.0 % efficient. So, 1.6×108 Joules of energy is actually…

Q: 35 g of water at 40 C and 95 g of water at 60 C are mixed. What is the temperature of this mixture ?…

A: Given data :

Q: A 1.50-g sample of hexane, C 6H 14 (MW = 86) undergoes complete combustion with excess 0 2 in a bomb…

A:

Q: A chemist carefully measures the amount of heat needed to raise the temperature of a 1.65kg sample…

A: Molar Heat Capacity: The molar heat capacity of a chemical substance is the amount of energy that…

Q: 4. The heat capacity of copper is 0.382 J/g°.C. A 22.6 g sample of copper at 93° C is placed in 50 g…

A:

Q: A 0.403-g sample of xanthone (C13H8O2) is burned in a bomb calorimeter and the temperature increases…

A:

Q: Consider the combustion of propane: C,H, (9) + 50 (9) 3CO,(9) + 4H,O(1) AH=-2221 kJ A balloon is…

A: The given data contains, Heat required = 1.4×108 J Assume y grams of propane is being combusted.…

Thermochemistry

Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.    

Exergonic Reaction

The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.