Required information

Problem $04\mathrm{.}037-$ Energy balance for water in a

piston$-$cylinder device

An insulated piston$-$cylinder device contains $3\mathrm{.}500$ L of

saturated liquid water at a constant pressure of $175$ kPa $.$

Water is stirred by a paddle wheel while a current of $8A$

flows for $45$ min through a resistor placed in the water. One$-$

half of the liquid is evaporated during this constant$-$pressure

process and the paddle$-$wheel work amounts to $400$ kJ $.$

Problem $04\mathrm{.}037.$a $-$ Find source voltage

Determine the voltage of the source. Use data from the steam tables.

$($Round the final answer to two decimal places.$)$

The voltage of the source is