Homework Answers
According to first law of thermodynamics
ΔU = q + w
ΔU = change in internal energy
q = heat transfer
w = work done
-400kJ = q + 250 kJ
q = -650 kJ
650 kJ energy is released as heat(negative sign is indicator of release of energy)
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D) hegative and positive. 12. The mixture of gas and air inside a cylinder reacts, releasing...
13. The mixture of gas and air inside a cylinder reacts, releasing 300 kJ of heat....
13. The mixture of gas and air inside a cylinder reacts, releasing 300 kJ of heat. If the system does 150 kJ of work on the piston, what is the change in total energy?
6. A sample of ammonium chloride dissolves in water, absorbing heat from the surrounding water and...
6. A sample of ammonium chloride dissolves in water, absorbing heat from the surrounding water and causing the temperature to drop by 20 °C. If the heat change for the reaction is +300 J, what is the heat change for the surrounding water? 12. The mixture of gas and air inside a cylinder reacts, releasing 400 kJ of total energy. If the system does 250 kJ of work on the piston, how much energy is released as HEAT?
A mixture of gaseous reactants is put into a cylinder, where a chemical reaction turns them into ...
A mixture of gaseous reactants is put into a cylinder, where a chemical reaction turns them into gaseous products. The cylinder has a piston that moves in or out, as necessary, to keep a constant pressure on the mixture of 1 atm. The cylinder is also submerged in a large insulated water bath. (See sketch at right.) 1 atm pressure piston cylinder From previous experiments, this chemical reaction is known to release 360. kJ of energy water bath gases The...
A mixture of gaseous reactants is put into a cylinder, where a chemical reaction turns them into gaseous products. The cylinder has a piston that moves in or out, as necessary, to keep a constant pre...
A mixture of gaseous reactants is put into a cylinder, where a chemical reaction turns them into gaseous products. The cylinder has a piston that moves in or out, as necessary, to keep a constant pressure on the mixture of 1 atm. The cylinder is also submerged in a large insulated water bath. (See sketch at right.) 1 atm pressure piston cylinder From previous experiments, this chemical reaction is known to release 368. kJ of energy water bath gases The...
An insulated piston-cylinder device contains 0.1m3 of air (ideal gas) at 400 kPa and 25℃. A...
An insulated piston-cylinder device contains 0.1m3 of air (ideal gas) at 400 kPa and 25℃. A paddle wheel within the cylinder is rotated until 15 kJ of work is done on the air while the pressure is held constant. Assuming the kinetic and potential energies are negligible and the gas constant and specific heat of air are ? = 0.287 kJ kg∙K and ?? = 1.005 kJ kg∙K . Tasks: ( a ) Determine the mass of air inside the...
A mixture of gaseous reactants is put into a cylinder, where a chemical reaction turns them...
A mixture of gaseous reactants is put into a cylinder, where a chemical reaction turns them into gaseous products. The cylinder has a piston that moves in or out, as necessary, to keep a constant pressure on the mixture of 1 atm. The cylinder is also submerged in a large insulated water bath. (See sketch at right.) 1 atm pressure piston bath From previous experiments, this chemical reaction is known to absorb 339. kJ of gases energy The position of...
A mixture of gaseous reactants is put into a cylinder, where a chemical reaction turns them...
A mixture of gaseous reactants is put into a cylinder, where a chemical reaction turns them into gaseous products. The cylinder has a piston that moves in or out, as necessary, to keep a constant pressure on the mixture of 1atm. The cylinder is also submerged in a large insulated water bath. (See sketch at right.) From previous experiments, this chemical reaction is known to absorb 137.kJ of energy. The temperature of the water bath is monitored, and it is...
1 atm pressure A mixture of gaseous reactants is put into a cylinder, where a chemical...
1 atm pressure A mixture of gaseous reactants is put into a cylinder, where a chemical reaction turns them into gaseous products. The cylinder has a piston that moves in or out, as necessary, to keep a constant pressure on the mixture of 1 atm. The cylinder is also submerged in a large insulated water bath. (See sketch at right.) piston cylinder From previous experiments, this chemical reaction is known to absorb 236. kJ of energy. water bath gases The...
1 atm pressure A mixture of gaseous reactants is put into a cylinder, where a chemical...
1 atm pressure A mixture of gaseous reactants is put into a cylinder, where a chemical reaction turns them into gaseous products. The cylinder has a piston that moves in or out, as necessary, to keep a constant pressure on the mixture of 1 atm. The cylinder is also submerged in a large insulated water bath. (See sketch at right.) piston cylinder From previous experiments, this chemical reaction is known to release 386. kJ of energy. water bath gases The...
1 atm pressure A mixture of gaseous reactants is put into a cylinder, where a chemical...
1 atm pressure A mixture of gaseous reactants is put into a cylinder, where a chemical reaction turns them into gaseous products. The cylinder has a piston that moves in or out, as necessary, to keep a constant pressure on the mixture of 1 atm. The cylinder is also submerged in a large insulated water bath. (See sketch at right.) piston cyli From previous experiments, this chemical reaction is known to absorb 379. kJ of energy. gases The position of...
13. The mixture of gas and air inside a cylinder reacts, releasing 300 kJ of heat. If the system does 150 kJ of work on the piston, what is the change in total energy?
6. A sample of ammonium chloride dissolves in water, absorbing heat from the surrounding water and causing the temperature to drop by 20 °C. If the heat change for the reaction is +300 J, what is the heat change for the surrounding water? 12. The mixture of gas and air inside a cylinder reacts, releasing 400 kJ of total energy. If the system does 250 kJ of work on the piston, how much energy is released as HEAT?
A mixture of gaseous reactants is put into a cylinder, where a chemical reaction turns them into gaseous products. The cylinder has a piston that moves in or out, as necessary, to keep a constant pressure on the mixture of 1 atm. The cylinder is also submerged in a large insulated water bath. (See sketch at right.) 1 atm pressure piston cylinder From previous experiments, this chemical reaction is known to release 360. kJ of energy water bath gases The...
A mixture of gaseous reactants is put into a cylinder, where a chemical reaction turns them into gaseous products. The cylinder has a piston that moves in or out, as necessary, to keep a constant pressure on the mixture of 1 atm. The cylinder is also submerged in a large insulated water bath. (See sketch at right.) 1 atm pressure piston cylinder From previous experiments, this chemical reaction is known to release 368. kJ of energy water bath gases The...
A mixture of gaseous reactants is put into a cylinder, where a chemical reaction turns them into gaseous products. The cylinder has a piston that moves in or out, as necessary, to keep a constant pressure on the mixture of 1 atm. The cylinder is also submerged in a large insulated water bath. (See sketch at right.) 1 atm pressure piston bath From previous experiments, this chemical reaction is known to absorb 339. kJ of gases energy The position of...
1 atm pressure A mixture of gaseous reactants is put into a cylinder, where a chemical reaction turns them into gaseous products. The cylinder has a piston that moves in or out, as necessary, to keep a constant pressure on the mixture of 1 atm. The cylinder is also submerged in a large insulated water bath. (See sketch at right.) piston cylinder From previous experiments, this chemical reaction is known to absorb 236. kJ of energy. water bath gases The...
1 atm pressure A mixture of gaseous reactants is put into a cylinder, where a chemical reaction turns them into gaseous products. The cylinder has a piston that moves in or out, as necessary, to keep a constant pressure on the mixture of 1 atm. The cylinder is also submerged in a large insulated water bath. (See sketch at right.) piston cylinder From previous experiments, this chemical reaction is known to release 386. kJ of energy. water bath gases The...
1 atm pressure A mixture of gaseous reactants is put into a cylinder, where a chemical reaction turns them into gaseous products. The cylinder has a piston that moves in or out, as necessary, to keep a constant pressure on the mixture of 1 atm. The cylinder is also submerged in a large insulated water bath. (See sketch at right.) piston cyli From previous experiments, this chemical reaction is known to absorb 379. kJ of energy. gases The position of...
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