Answer:
Explanation:
Heat flow equation => q = m·c·ΔT
m = mass in grams = 10.00 grams
c = specific heat (a constant) = 0.900j/g·°C
ΔT = temperature change in °C = 50°C - 25°C = 25°C
q = (10.00g)(0.900j/g·°C)(25°C) = 225 joules absorbed*
*absorbed => endothermic process => need to show 'plus' energy change.
If the reactions were an exothermic process the problem would use terms like energy released, energy lost, energy given-up, etc... => would require using a 'negative' signage before the calculated energy value. So, the correct choice is the +225 joules value.
