Multiple Choice
A 18.6-g piece of gold (s = 0.129 J/(g·°C) ) ,initially at 285.4°C,is added to 147.2 g of a liquid,initially at 27.9°C,in an insulated container.The final temperature of the metal-liquid mixture at equilibrium is 28.9°C.What is the identity of the liquid? Neglect the heat capacity of the container.
A) ethanol (s = 2.43 J/(g·°C) )
B) water (s = 4.18 J/(g·°C) )
C) methanol (s = 2.53 J/(g·°C) )
D) acetone (s = 2.15 J/(g·°C) )
E) hexane (s = 2.27 J/(g·°C) )
Correct Answer:
Verified
Correct Answer:
Verified
Q55: How much heat is liberated at constant
Q56: Commercial cold packs consist of solid ammonium
Q57: When 50.0 mL of 1.60 M of
Q58: The energy associated with a stretched spring
Q59: What quantity,in moles,of hydrogen is consumed when
Q60: A 170.0-g sample of metal at 83.00°C
Q61: In thermodynamics,a(n)_ is defined as the object,or
Q62: At constant pressure and 25°C,what is Δ<sub>r</sub>H°
Q63: If 50.0 g of benzene (C<sub>6</sub>H<sub>6</sub>)absorbs 2.71
Q65: Hydrazine,N<sub>2</sub>H<sub>4</sub>,is a liquid used as a rocket