A sample of granite at 85.0 C is immersed into a 75.0g of water
at 24.0C....
A sample of granite at 85.0 C is immersed into a 75.0g of water
at 24.0C. At equilibrium the temp. is 28.7C, what is the mass of
the granite? (Cs for granite=.790 J/g*C)
A 15.0g sample of an unknown metal at 85.0*C was placed in 60.0g
of water at 20.0*C. the final temperature of the metal and water
was 25.8*C. calculate the metal's specific heat (please show the
work)
how much heat in calories and joules is required to raise the
temperature of 75.0g of a substance (specific heat is 1.80cal/g x
*C) from 25.0*C to 95.0*C? please show the work. thank you
A copper ball of temperature 100 °C is immersed to a water bath
of 50 °C. After 10 minutes the temperature of the ball is 80 °C and
the temperature of the water is 60 °C. You may assume that Newton’s
Law of Cooling is obeyed and all the heat lost by the ball is
absorbed by the water. Find the equilibrium temperature of the ball
as a function of time.
A cell is immersed in water at 0 o C for a
considerable period of time. It is then taken out and the contents
of its vacuole are found to be approximately 0.2 M sucrose [assume
this is the overall molarity for the cell].
(a) At equilibrium, what was the cell's Yp?
(b) What would its Yp have been had it contained 0.2 M
NaCl?
Green Valley Water and Granite Slope Water are sellers of spring
water in the Republic of Bogritania. Like mineral water sellers in
many simple examples, they have no costs so their payoffs are the
revenues they obtain from selling water. The price of mineral water
in Bogritania is 1,000-qv-qs , where
qv is the quantity sold by Green Valley and
qs is the quantity sold by Granite Slope. As a
result:
Proposition A: Each firm's best response is to sell...
A 48.78−g sample of water at 77.5°C is added to a sample of
water at 24.9°C in a constant-pressure calorimeter. If the final
temperature of the combined water is 38.1°C and the heat capacity
of the calorimeter is 26.3 J/°C, calculate the mass of the water
originally in the calorimeter.
if 655g of diamond is immersed in 2.5 L of water (assume the
density of water is 1g/mL) initially at room temperature (25 degree
celsius) and the sample is initially at 815 degree celsius,
determine the final temperature of both water and diamond
Suppose that 0.83 g of water condenses on a 85.0 g block of iron
that is initially at 20 ?C.
If the heat released during
condensation goes only to warming the iron block, what is the final
temperature (in ?C) of the iron block? (Assume a constant enthalpy
of vaporization for water of 44.0kJ/mol.)
Part A
A gas sample enclosed in a rigid metal container at room temperature (20.0∘C) has an absolute pressure p1. The container is immersed in hot water until it warms to 40.0∘C. What is the new absolute pressure p2?
Express your answer in terms of p1.
p2 =
1.0682p1
Part B
Nitrogen gas is introduced into a large deflated plastic bag. No gas is allowed to escape, but as more and more nitrogen is added, the bag inflates to accommodate it. The pressure...
Each of the following mixtures is placed in a dialyzing bag and
immersed in distilled water. Which substances will be found outside
the bag in the distilled water? Part A KCl solution and glucose
solutionsan,PART B albumin solution (colloid),
Part C
an albumin solution (colloid), KCl solution, and glucose
solution
Part D
urea solution and NaCl solution
A sample of gas with a thermometer immersed in the gas is held
over a hot plate. A student is asked to give a step-by-step account
of what makes our observation of the temperature of the gas
increase. His response includes the following steps.
(a) The molecules speed up.
(b) Then the molecules collide with one another more often.
(c) Internal friction makes the collisions inelastic.
(d) Heat is produced in the collisions.
(e) The molecules of the gas transfer...