Food contains chemical energy

the up arrow } to highlight MODE. Press Í ÍÍ Í to get screen 2 Screen 2 Select 2 : T i me g r a p h : T i me g r a p h : T i me g r a p h : T i me g r a p h to get screen 3 Screen 3 Select 2 : c h a n g e t i me s e t t i n g s 2 : c h a n g e t i me s e t t i n g s 2 : c h a n g e t i me s e t t i n g s 2 : c h a n g e t i me s e t t i n g s Enter 2 as time between samples in seconds Enter 60 as number of samples Press Í ÍÍ Í to get screen 4 Screen 4 Select 1 : OK 1 : OK 1 : OK 1 : OK to confirm settings, select 1 : OK 1 : OK 1 : OK 1 : OK again to return to the main menu. Weigh the walnut and record the mass Select 2 : ST ART 2 : ST ART 2 : ST ART 2 : ST ART The calculator will start to record data.<br><br> Use a Bunsen to light the walnut. Hold the walnut under the test tube. As soon as the data collection has finished, blow out the walnut.<br><br> The calculator will auto scale the data. As in Screen 5 Screen 5 To show that food contains energy © A Walshe Page 2 Use the |~ cursors to locate the minimum and maximum temperatures. Record these values.<br><br> Reweigh the walnut and record these values. Results Minimum temperature Maximum temperature Change in temperature Weight Change in temperature Per gram Processing the data Print a graph of change of temperature with time, and answer the following questions. 1.<br><br> Is there more or less energy in the walnut before it was burned than after it was burned? 2. Where did the energy from the walnut go?<br><br> 3. Is burning a walnut an exothermic or an endothermic reaction? 4.<br><br> In this experiment, the _______________ Energy in the walnut is changed to _________________ energy in the water.

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