Calculating Heat Required to Heat Water from 15.5°C to 85°C

[kimkibun]

Homework Statement

An aluminum vessel hose mass is 178g contains 90g of water at 15.5°C. How many calories of heat are required to bring the water to a final temperature of 85°C? The specific heat of water is 1cal/g°C.

Given:
m_Al=178g
m_H2O=90g
T₁=15.5°C
T₂=85°C
c_H2O=1cal/g°C

Homework Equations

Im planning to use this formula for heat quantity

Q_H2O=m_H2Oc_H2OΔT_H2O

The Attempt at a Solution

 

[LawrenceC]

Homework Statement

An aluminum vessel hose mass is 178g contains 90g of water at 15.5°C. How many calories of heat are required to bring the water to a final temperature of 85°C? The specific heat of water is 1cal/g°C.

Given:
m_Al=178g
m_H2O=90g
T₁=15.5°C
T₂=85°C
c_H2O=1cal/g°C

Homework Equations

Im planning to use this formula for heat quantity

Q_H2O=m_H2Oc_H2OΔT_H2O

The Attempt at a Solution

What about the aluminum vessel? How can you heat the water without also heating the vessel?