Question

In an experiment, 106 g of gasoline is poured into an insulated, 17 g, glass cup, both have an initial temperature of 29.4 ^oC. Then a 72.5 g piece of steel at a temperature of 90.1 ^oC is immersed in the gasoline. In a short time this insulated system reaches equilibrium.

a) Using the data provided, calculate the equilibrium temperature.  ^oC

Calorimetry Data

		Sample: steel		Liquid: gasoline		Cup: glass
cSolid  (J/(kg*oC))		490		NA		840
Lf  (kJ/kg)	m.p. (ºC)	272	1,490	205	-50	NA
cLiquid (J/(kg*oC))		820		2,220		NA
Lv  (kJ/kg)	b.p. (ºC)	6.21	2,750	250	85	NA
cVapour  (J/(kg*oC))		NA		1,000		NA

Answer 1