UM ESTUDANTE COMPROU UMA CAFETEIRA ELÉTRICA DE 700 W (...) | CALORIMETRIA E MUDANÇA DE FASE

Improve your grades at school or guarantee your approval in the university entrance exam by paying R$1.33 per day. Become an Explicaê Premium student and have access to all the content for Elementary and High School. https://explicae.com.br/?utm_source=y... Use the coupon: EXPRESOLVE and get 20% off on any plan: https://explicae.com.br/?cupom=expres... _ Welcome to Explicaê Resolve Enem! Now you can follow all the solutions to the Enem questions together with the Exquad teachers! 3.3 CALORIMETRY AND PHASE CHANGE Have access to our complete and unlimited content by paying from R$15.00 per month: http://bit.ly/explicae-cupom-expresolve Have you already read our Survival Guide for the Enem? All the Enem exams are separated by subject and topic Use the coupon: EXPRESOLVE and get a 20% discount on any plan _____ A student bought a 700 W electric coffee maker with a capacity of 0.5 L of water (500 g). While the coffee was being prepared at the maximum capacity of the coffee maker, he noted that it took 3 minutes for the coffee maker to boil all the water (100 °C) from a room temperature of 20 °C. Then, to evaluate the efficiency of the coffee maker, he calculated this time disregarding any energy losses. It takes 1 cal (4.2 J) to raise the temperature of 1 gram of water by 1 °C. What is the energy efficiency calculated by the student? a -100% b -75% c -60% d -7.5% e - 5.1% _____ Be part of EXQUAD by following our social networks: Instagram: / explicaeoficial Facebook: / explicaeoficial Youtube: https://www.youtube.com/channel/UCjiE... Linkedin: / explicae Twitter: / explicaeoficial