An object with a mass of #18 kg#, temperature of #270 ^oC#, and a specific heat of #8 J/(kg*K)# is dropped into a container with #48 L # of water at #0^oC #. Does the water evaporate? If not, by how much does the water's temperature change?

1 Answer
Jan 1, 2018

Answer:

THe water will not evaporate and the change in temperature is #=0.19^@C#

Explanation:

The heat is transferred from the hot object to the cold water.

Let #T=# final temperature of the object and the water

For the cold water, # Delta T_w=T-0=T#

For the object #DeltaT_o=270-T#

# m_o C_o (DeltaT_o) = m_w C_w (DeltaT_w)#

The specific heat of water is #C_w=4.186kJkg^-1K^-1#

The specific heat of the object is #C_o=0.008kJkg^-1K^-1#

The mass of the object is #m_0=18kg#

The mass of the water is #m_w=48kg#

#18*0.008*(270-T)=48*4.186*T#

#270-T=(48*4.186)/(18*0.008)*T#

#270-T=1395.3T#

#1396.3T=270#

#T=270/1396.3=0.19^@C#

As #T<100^@C#, the water will not evaporate