Question

Some stainless steel implements, in a well insulated container,
are brought into thermal equilibrium with 100 g of steam (water
vapour). Initially the steam was at a temperature of
100^{0}C and the implements were at a temperature of
10^{o}C.

Lv (water) = 2256 kJ kg^{-1}; Cwater = 4.19 kJ
kg^{-1} K^{-1}; C stainless-steel = 0.9 kJ
kg^{-1} K^{-1}

**Question:**

Which ONE of the following statements transforming 100 g of
steam at 100^{0}C into 100 g of water at 100^{0}C
is FALSE?

A. Heat is transferred even though the temperature of the water and steam does not change.

B. In transforming to liquid water, 225.6 kJ of heat is extracted from the steam.

C. Liquid water can never be at the same temperature as steam.

D. The molecules in the steam are further apart on average than the molecules in the liquid.

E. The temperature at which the phase changes from steam to liquid water depends on the ambient air pressure.

Answer #1

What mass of steam at 100°C must be mixed with 216 g of ice at
its melting point, in a thermally insulated container, to produce
liquid water at 65.0°C? The specific heat of water is 4186 J/kg·K.
The latent heat of fusion is 333 kJ/kg, and the latent heat of
vaporization is 2256 kJ/kg.

What mass of steam at 100°C must be mixed with 162 g of ice at
its melting point, in a thermally insulated container, to produce
liquid water at 71.0°C? The specific heat of water is 4186 J/kg·K.
The latent heat of fusion is 333 kJ/kg, and the latent heat of
vaporization is 2256 kJ/kg.

What mass of steam at 100°C must be mixed with 260 g of ice at
its melting point, in a thermally insulated container, to produce
liquid water at 73.0°C? The specific heat of water is 4186 J/kg·K.
The latent heat of fusion is 333 kJ/kg, and the latent heat of
vaporization is 2256 kJ/kg

What mass of steam at 100°C must be mixed with 301 g of ice at
its melting point, in a thermally insulated container, to produce
liquid water at 16.0°C? The specific heat of water is 4186 J/kg·K.
The latent heat of fusion is 333 kJ/kg, and the latent heat of
vaporization is 2256 kJ/kg.

In a closed container, one gram of water (1 cm3) is
boiled under constant pressure of 1 atm (1.013 × 105 Pa)
until it changes into steam.
The heat of vaporization at this pressure is Lv =
2.256 × 106 J/kg = 2256 J/g.
Assume that water vapor behaves like an ideal gas. The
temperature of the steam is 373 K, number of moles of water vapor n
= 0.0546 (g mol), the ideal gas constant R = 82.057
(cm3·atm/g...

1) A 32 g stainless steel ball at 110.5°C is placed in a
constant pressure calorimeter containing 100 ml of water at 20 °C.
Calculate the final temperature of water. The specific heat of the
ball is 0.474 J/g°C and the specific heat of water is 4.18
J/g°C.
explain plz

1. An insulated container holds 0.282 kg of water at 22.5C. What
is the final equilibrium temperature after a 0.153 kg block of tin
at 90.1C is placed in the water? Assume no energy is exchanged with
container.
2. How much heat is neccessary to convert 85.0g of water at 100C
to 47.0g of water and 38.0 g of steam at 100C?

A well-insulated 0.2kg copper bowl contains 0.10kg of ice, both
at −10◦ C. A very hot 0.35kg copper cylinder is dropped into it and
the lid quickly closed. The final temperature of the system is
100◦C, with 5g of steam in the container.
(a) How much heat was transferred to the water (in all
phases);
(b) How much to the bowl?
(c) What must have been the original temperature of the
cylinder?
The specific heat of copper is 386 J/kg·K....

Finding the equilibrium temperature of a mixture: An
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a quantity of liquid water and a quantity of ice. What is the fully
thermalized state of the system (the final temperature, how much
water, and how much ice) provided that initially there is 1.0 kg of
ice at -100 degrees Celsius, 10 kg of water at 1 degrees Celsius,
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An insulated cylinder fitted with a movable piston to maintain
constant pressure initially contains 100 g of ice at -10 C. Heat is
supplied to the contents at a constant rate by a 100 W heater. Make
a graph showing temperature of the cylinder contents as a function
of time starting at t = 0, when the temperature is -10 C and ending
when the temperature is 110 C. ( c = 2.0 kJ/ kg K for specific heat
of...

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