Steam at is passed into of water initially at contained in a thermally insulated vessel

PHYSICS · Subjective · A Level · Physics · Further mechanics and thermal physics · Further mechanics and thermal physics

Problem

Steam at

100\,^{\circ}\text{C}

is passed into

200\,\text{g}

of water initially at

25\,^{\circ}\text{C}

contained in a thermally insulated vessel. If

20\,\text{g}

of steam is condensed, determine the final temperature of the water. \newline\newline (Use

c_{\text{water}} = 4200\,\text{J kg}^{-1}\text{K}^{-1}

and

L_{\text{vaporisation}} = 2.26 \times 10^{6}\,\text{J kg}^{-1}