A huge 4.0-F capacitor has enough stored energy to heat 2.5 kg of water from 21 degree Celsius to 95 degree Celsius. What is the potential difference across the plates?(adsbygoogle = window.adsbygoogle || []).push({});

What equation am I supposed to use for potential difference?

Is it V = Change in PE / q

V= - W / q

V = (PE)(.5)/ Q

Also, I'm supposed to find how much energy is required to heat the water right? What equation do I use for that?

I'm just confused with this problem... Can somebody please help. Thanks

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# What equation am I supposed to use for potential difference?

**Physics Forums | Science Articles, Homework Help, Discussion**