Asked by Emma
How long does it take an immersion heater with a 500 W power rating to heat up 500 g of h2o from 15 c to 100 c if the water is in an aluminum cup with mass 200 g. the specific heat of aluminum is 99 j/ (kg K)
Answers
Answered by
DrBob222
So you must heat 500 g H2O from 15 C to 100 C + 200 g Al dish from 15 C to 100 C.
q for H2O = 500 x 4.184 J/g x (100-15) = ? joules
q for Al dish = 200 x 0.099 J/g x (100-15) = ? joules
total q = qH2O + qAl = ? joules
The heater is 500 watts which is 500 Joule/second
500 J/s x # seconds = ? total J from above. Solve for seconds. Post your work if you get stuck.
q for H2O = 500 x 4.184 J/g x (100-15) = ? joules
q for Al dish = 200 x 0.099 J/g x (100-15) = ? joules
total q = qH2O + qAl = ? joules
The heater is 500 watts which is 500 Joule/second
500 J/s x # seconds = ? total J from above. Solve for seconds. Post your work if you get stuck.
There are no AI answers yet. The ability to request AI answers is coming soon!
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.