document.write( "Question 950011: A total of 0.8 kg of water at 20 deg. C is placed in 1 kW electric kettle. How long a time is needed to raise the temperature of water to 100 deg. C \n" ); document.write( "

Algebra.Com's Answer #580062 by Fombitz(32388) $\"\"$ $\"About$

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The heat capacity of water is 4.18 J/(gK).
\n" ); document.write( " $\"Q=mC%5Bp%5D%2A%28T%5Bf%5D-T%5B0%5D%29\"$
\n" ); document.write( " $\"Q=%28800%29%284.18%29%28100-20%29\"$ $\"J\"$
\n" ); document.write( " $\"Q=267520\"$ $\"J\"$
\n" ); document.write( "Assuming 100% efficiency,
\n" ); document.write( " $\"1\"$ $\"W\"$ = $\"1\"$ $\"J%2Fs\"$
\n" ); document.write( " $\"1\"$ $\"kW\"$ = $\"1000\"$ $\"J%2Fs\"$
\n" ); document.write( ".
\n" ); document.write( ".
\n" ); document.write( " $\"t=267520%2F%281000%29\"$
\n" ); document.write( " $\"t=267.52\"$ $\"s\"$
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