-Qhot = Qcold
-Qal = Qwater
-m*C*(Tf-Tal) = mw*Cpw*(Tf-Twater)
substitute
-20*0.90*(26.5-98) = 50*4.184*(26.5-Twater)
-20*0.90*(26.5-98) /( 50*4.184) - 26.5 = -Tw
tw = -20.34
Twate rinitially = 20.34°C
A hot lump of 32.3 g of copper at an initial temperature of 96.5°C is placed in 50.0 mL H2O initially at 25.0°C and allowed to reach thermal equilibrium. What is the final temperature of the copper and water given that the specific heat of copper is 0.385J/g°C and the specific heat of water is 4.184J/g°C? 4. A hot lump of 32.3 g of copper at an initial temperature of 96.5°C is placed in 50.0 mL H20 initially at 25.0°C...
4. A 100 g block of ice at 0°C is placed in bowl containing 100 g of water at a temperature of 50°C. Neglecting the energy transferred to the bowl, which statement best describes the flow of heat energy and the final temperature of the mixture when they reach equilibrium? a. b. c. d. e. Heat flows from the ice to the water and the final temperature of the mixture will be 0°C. Heat flows from the water to the...
re-lab questions. 1. Use the following enthalpies of formation to determine the enthalpy of reaction for the decomposition of formic acid, HCOOH(), into CO(g) and H:O() ??9 [CO(g)--110.5 kJ/mol ??''t [ H2O(l) ] -285.5 kJ/mol ??9 [HCOOH(1)] -424.7 kJ/mol 6.5° C When 20 g of Al (s) at 98° C is placed in 50 g of H:00), the final temperature is 2 What was the initial temperature of the water? 2.
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A 74-g ice cube at 0°C is placed in 841 g of water at 30°C. What is the final temperature of the mixture?