Calculate the final temperature when of water at is mixed with of water at in a…

PHYSICS · Subjective · AP · Physics 2: Algebra-based · Thermodynamics · Thermodynamics

Problem

Calculate the final temperature when

200\,\text{g}

of water at

80^{\circ}\text{C}

is mixed with

300\,\text{g}

of water at

20^{\circ}\text{C}

in a perfectly insulated vessel. (Take the specific heat capacity of water as

4.18\,\text{kJ\;kg}^{-1}\text{K}^{-1}