How much energy in kW was the hot pot using to heat the water from 20 to boiling

Question

How much energy in kW was the hot pot using to heat the water from 20 to boiling? Do you need to account for a phase change of water?

How long does it take to get the waterfrom 20 to 50 degrees?

I used to sell ice cream at a state fair as part of a fundraiser. One year, it was very cold and we were selling a lot more hot chocolate than usual. Our water cooler was terrible at heating water, so I brought in my electric hot pot. This was much faster at heating water: it could heat about 1 kg of water from 20°C to a full boil in 5 minutes. (30 points)

Explanation / Answer

energy required to heat the water = (mcT)/t

= [1000 x 4.18 x (373 - 293)]/300

= 1114.67 W = 1.11 KW

time required to heat up to 50 degree= energy / power

= [1000 x 4.18 x (323 - 293)]/1114.67

= 112.5 second = 1.87 minute

if you satisfied with the answer please like it....

Related Questions

Navigate

• Browse (All)
• Browse H
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.