𝑬𝒑𝒈 = 𝑸 ; 𝑬𝒑𝒈 = 𝒎. 𝒈. 𝒉 𝑸 = 𝑴. 𝒄. ∆𝑻 e
𝒎. 𝒈. 𝒉 = 𝑴. 𝒄. ∆𝑻
∆𝑻 =𝒎
𝑴
𝒈𝒉
𝒄
L
dA
dB
L
L
dA
L
dB
TQ TF
∆𝑸𝑨
∆𝒕= 𝒌𝑨
𝑨𝑨. ∆𝑻
𝑳𝑨
∆𝑸𝑩
∆𝒕= 𝒌𝑩
𝑨𝑩. ∆𝑻
𝑳𝑩
∆𝑸𝑨
∆𝒕=
∆𝑸𝑩
∆𝒕
𝒌𝑨
𝑨𝑨. ∆𝑻
𝑳𝑨= 𝒌𝑩
𝑨𝑩. ∆𝑻
𝑳𝑩 ;
𝑨𝑨 = 𝝅. 𝒓𝑨𝟐 = 𝝅.
𝒅𝑨
𝟐
𝟐
𝑨𝑩 = 𝝅. 𝒓𝑩𝟐 = 𝝅.
𝒅𝑩
𝟐
𝟐
𝒌𝑨. 𝝅.𝒅𝑨
𝟐
𝟐
= 𝒌𝑩. 𝝅.𝒅𝑩
𝟐
𝟐
𝒌𝑨.𝟒𝒅𝑩
𝟐
𝟒= 𝒌𝑩.
𝒅𝑩𝟐
𝟒
𝒌𝑨 =𝒌𝑩
𝟒
∆𝑸
∆𝒕= 𝒌
𝑨. ∆𝑻
𝑳
∆𝑸 = 𝒌𝑨. ∆𝑻. ∆𝒕
𝑳 ; ∆𝑸 = 𝒎𝑯𝟐𝑶. 𝑳𝒇
𝒎𝑯𝟐𝑶. 𝑳𝒇 = 𝒌.𝑨. ∆𝑻. ∆𝒕
𝑳
𝒎𝑯𝟐𝑶 = 𝒌.𝑨. ∆𝑻. ∆𝒕
𝑳. 𝑳𝒇
𝒎𝑯𝟐𝑶 = 𝟎, 𝟎𝟏.𝟎, 𝟖𝟎. 𝟑𝟎. 𝟖, 𝟔𝟒. 𝟏𝟎𝟔
𝟐. 𝟏𝟎−𝟐. 𝟑, 𝟐. 𝟏𝟎𝟓
𝒎𝑯𝟐𝑶 = 𝟑, 𝟐𝟒 𝒌𝒈
𝑸 = 𝒎𝑯𝟐𝑶. 𝑪𝑯𝟐𝑶. ∆𝑻𝑯𝟐𝑶
𝑸 = 𝟏𝟎𝟎𝒈.𝟏 𝒄𝒂𝒍
𝒈℃. 𝟖𝟎 ℃
𝑸 = 𝟖𝟎𝟎𝟎 𝒄𝒂𝒍 ou
𝑸 = 𝟑𝟑𝟔𝟎𝟎 𝑱
𝑷 =𝑬
∆𝒕 ; 𝑬 = 𝑸
𝑷 =𝑸
∆𝒕
∆𝒕 =𝑸
𝑷
∆𝒕 =𝟑𝟑𝟔𝟎𝟎 𝑱
𝟐𝟎𝟎 𝑾
∆𝒕 = 𝟏𝟔𝟖 𝒔