Calculate the initial temperature of 21.8 g of lithium (specific heat capacity = 3.582 J g^-1 °C^-1) that absorbs 1642 J of energy from the surroundings and has a final temperature of 31.08 °C.

Question

Quizplus · Accepted Answer

To find the initial temperature, use the formula q = mcΔT. Rearrange to find ΔT = q / (mc). Substitute q = 1642 J, m = 21.8 g, c = 3.582 J/g°C, and ΔT = T_final - T_initial. Solve for T_initial: T_initial = T_final - (q / (mc)) = 31.08°C - (1642 J / (21.8 g * 3.582 J/g°C)) = 10.05°C.

Calculate the Initial Temperature of 21