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WorksheetsQuiz energy change
Total questions: 10
Worksheet time: 8mins
1. When we use a fan the energy changes from electrical energy to?
Heat energy
Motion energy
Sound energy
Light energy
In vehicles the energy changes from chemical energy to?
heat energy
motion energy
sound energy
light energy.
∆𝐸 = 𝑞 + 𝑤 is the formula for...
1st law of thermodynamics
2nd law of thermodynamics
3rd law of thermodynamics
4th law of thermodynamics
The minus sign on the work process done by the environment system means
the work is not the system.
the work done by the system
heat goes out of the system into the environment
heat enters the system
What is meant by enthalpy change?
Temperature change
Change of state
Day change
Heat change
A piece of barium metal is reacted with dilute hydrochloric acid in an open system with the reaction Ba + 2HCl –> BaCl2 + H2.
In this reaction, the system releases heat which causes a change in volume. The system also does a work of 45 kJ.
The amount of energy change in this process is...
-195 kJ
+185 kJ
. -162.8 kJ
+195 kJ
The transfer of energy from one state to another at constant pressure is...
Calories
Work
Enthalpy
Potential energy
Which of the following statements about the enthalpy change is _incorrect_...
The change in enthalpy is the change in heat at constant pressure.
The value of the enthalpy change depends on the amount of substance, temperature, and pressure.
The value of the enthalpy change is affected by the course of the reaction.
The standard enthalpy change value is measured at 298 K and 1 atm.
A process takes place in which the system releases 18 kJ of heat to the surroundings and receives 160 J of work. The change in energy in the system is...
16.4 kJ
1.64 Kj
- 164 Kj
-16.4 Kj
Calculate the change in energy in the surroundings for the following process in which the system releases 10 kJ of heat to the surroundings and receives 100 J of work.
1.01kJ
10.1 Kj
101 Kj
90 Kj
