A volume of 115${\rm mL}$ of $\rm H_2O$ is initially at room temperature (22.0$\rm{}~^{\circ}C$). A chilled steel rod at 2.00$\rm~^{\circ}C$ is placed in the water. If the final temperature of the system is 21.4${\rm ~^{\circ}C}$ , what is the mass of the steel bar?
Use the following values:

specific heat of water = 4.18 $\rm J/(g\cdot{^{\circ}C})$

specific heat of steel = 0.452 $\rm J/(g\cdot{^{\circ}C})$

Question

A volume of 115${\rm mL}$ of $\rm H_2O$ is initially at room temperature (22.0$\rm{}~^{\circ}C$). A chilled steel rod at 2.00$\rm~^{\circ}C$ is placed in the water. If the final temperature of the system is 21.4${\rm ~^{\circ}C}$ , what is the mass of the steel bar? 
Use the following values:

specific heat of water = 4.18 $\rm J/(g\cdot{^{\circ}C})$ 

specific heat of steel = 0.452 $\rm J/(g\cdot{^{\circ}C})$