100 kJ of energy is introduced to your cell phone while it charges but 10 kJ of energy is lost in the process as heat given off to the surroundings. What is ΔE for the system?
Question
100 kJ of energy is introduced to your cell phone while it charges but 10 kJ of energy is lost in the process as heat given off to the surroundings. What is ΔE for the system?
Solution
The change in energy (ΔE) for the system can be calculated by subtracting the energy lost from the energy gained.
Step 1: Identify the energy gained by the system. In this case, it is 100 kJ.
Step 2: Identify the energy lost by the system. In this case, it is 10 kJ.
Step 3: Subtract the energy lost from the energy gained to find the change in energy.
So, ΔE = Energy gained - Energy lost ΔE = 100 kJ - 10 kJ ΔE = 90 kJ
Therefore, the change in energy for the system is 90 kJ.
Similar Questions
What is ΔSsurr when 40kJ of heat is removed from the system at 200K?Group of answer choices200 J/K- 0.2 J/K- 200 J/K0.2 J/K
When energy is absorbed, ΔH is _____.
The system absorbs 25 kJ of heat, calculate the work of the system if there is no change in internal energy?
ΔH for the following reaction is -180 kJ. How much heat is released when 10 moles of Na are allowed to react? 2 Na(s) + 2 H2O(l) –> 2 NaOH(aq)+ H2(g) Group of answer choices900 kJ1000 kJ800 kJ700 kJ
ΔH is _____ for an exothermic reaction.
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.