Chapter 2, Problem 2.13NP

Interpretation Introduction

Interpretation: The final temperature of water needs to be determined if system contains 82.5 g of water at 300 K is heated at constant pressure of 1 bar. Current of 1.75 A passed through 25.0 ohm resistor for 100 s.

Concept Introduction: The heat can be calculated from current, resistor and time as follows:

  $q=I^{2}Rt$

Here, I is current, R is resistor and t is time.

It is also related to heat capacity at constant pressure as follows:

  $q=n{C}_{P,m}\Delta T$

Here, n is number of moles, $C_{P,m}$ is molar heat capacity at constant pressure and $\Delta T$ is change in volume.