Thermal Energy Question

  • #1
Homework Statement
How much energy is required to change one quarter of 8.0 kg of water at 25 degrees celsuis into steam(100 degrees celcuis)
Relevant Equations
Q=Qwarm water+Qsteam
Q=(8kg)(4200J)(100C-25C)+(2kg)(2.3*10 to the power of 6 J/Kg)
Q=7.12*10 to the power of 6 J
Is this the correct answer?
  • #2
Why only 2kg water turning to steam?
  • #3
Because that's what the question states
  • Like
Likes malawi_glenn
  • #4
Ah great, I missed the one quarter.

Answer is correct. Keep in mind correct significant digits and usage of prefix
Last edited:
  • #5
Thank you!
  • Like
Likes malawi_glenn

Suggested for: Thermal Energy Question