Respostas

2014-06-05T09:36:59-03:00

Q= m . c . dΔ            DΔ= 23-15 = 8

Q= 2.1 .8

Q= 16

1 CALORIA= 4,18 J

vamos ter q usar regra de 4.

1cal--------- 4,18J

x cal---------- 200J

4,18 x= 200

x=200/4,18]

x= 47,8 cal

2 2 2