Calculate the heat change which accompanies the combustion of ethanol when a certain mass of a subst

Step 1: Write the heat equation
Heat (Q) = mass × specific heat capacity × temperature change
Q = mcΔT

Step 2: Identify the given values
Mass of water (m) = 200 g
Specific heat capacity (c) = 4.2 J/g·K
Initial temperature = 26°C
Final temperature = 58°C

Step 3: Calculate temperature change
ΔT = Final temperature – Initial temperature
ΔT = 58°C – 26°C = 32°C (or 32 K)

Step 4: Calculate heat absorbed by water
Q = 200 g × 4.2 J/(g·K) × 32 K
Q = 200 × 4.2 × 32
Q = 26,880 J

Conclusion: The combustion of ethanol released 26,880 joules of heat energy, which was absorbed by the water, causing its temperature to rise by 32 degrees Celsius.