The specific heat(c) of copper is 0.39 J/g °C. What is the temperature
change(At) when 100 Joules of heat(Q) is added to 20 grams?

The temperature change (∆T) of the copper when 100 Joules of heat is added to 20 grams is 12.82°C

HOW TO CALCULATE TEMPERATURE CHANGE:

The temperature change (∆T) of copper metal can be calculated using the following formula:Q = m × c × ∆T

Where;

Q = quantity of heat absorbed or released (J)m = mass of copper (g)c = specific heat capacity (J/g°c)∆T = temperature change (°C)According to this question, 100 Joules of heat is added to 20 grams of copper. The temperature change is calculated as follows:

100 = 20 × 0.39 × ∆T

100 = 7.8∆T

∆T = 100 ÷ 7.8

∆T = 12.82°C

Therefore, the temperature change (∆T) of the copper when 100 Joules of heat is added to 20 grams is 12.82°C

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The answer is water molecules are split.cellular respiration and photosynthesis are complement  reactions to each other. these are reverse reactions. in cellular respiration glucose and oxygen yield water and carbon dioxide. so, when respiration begins,  glucose molecules are split. in the opposite reaction - in photosynthesis, carbon dioxide and water yield glucose and oxygen. thus,  when respiration begins, water molecules are split.