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Molecular Physics | Thermodynamics
Three liquids are at temperatures of 12 ◦C,
25◦C, and 38◦C, respectively. Equal masses of
the first two liquids are mixed, and the equilibrium temperature is 15◦C. Equal masses of
the second and third are then mixed, and the
the equilibrium temperature is 30.5
◦C.
Find the equilibrium temperature when
equal masses of the first and third are mixed.
Answer in units of ◦C.
25◦C, and 38◦C, respectively. Equal masses of
the first two liquids are mixed, and the equilibrium temperature is 15◦C. Equal masses of
the second and third are then mixed, and the
the equilibrium temperature is 30.5
◦C.
Find the equilibrium temperature when
equal masses of the first and third are mixed.
Answer in units of ◦C.
Molecular Physics | Thermodynamics
An example of the first law of thermodynamics in our daily life’s applies
search ONE example to which The First law of Thermodynamics in our daily life applies.
1. Name the specific energy that applies to your example.
2. Explain the conservation of energy according to the First law of Thermodynamics in your example.
search ONE example to which The First law of Thermodynamics in our daily life applies.
1. Name the specific energy that applies to your example.
2. Explain the conservation of energy according to the First law of Thermodynamics in your example.
Molecular Physics | Thermodynamics
A poker iron has one end in a fire of temperature T = 500° C. The other end is at 26° C. Its length is 1.2 m and is radius is 5 x 10-3 m. How much heat, Q, is conducted from one end of the poker to the other in 10 s? kiron = 79 (J/s∙m∙°C)
Molecular Physics | Thermodynamics
A 1-kg block of ice is at -15° C. 4 x 105 J of heat is added to the ice block. NOTE: (a) should be divided into two parts: how much heat is needed to raise the temperature of the ice to 0 °C, and how much heat is required to melt it; then compare that sum total to 4.0 x 105 J (the specific heat to use for ice is provided in the accompanying sheet to this homework)
(a) Does it fully melt?
(b) What is the final overall temperature?
(a) Does it fully melt?
(b) What is the final overall temperature?
Molecular Physics | Thermodynamics
1. A 1000-kg block of ice melts in an arctic lake. The ice is at 0° C. The lake is initially at 10° C and cools to 5° C after the ice melts.
(a) What is the mass of the water in the lake?
(b) What is the heat lost by the lake due to the block of ice melting?
(a) What is the mass of the water in the lake?
(b) What is the heat lost by the lake due to the block of ice melting?
Molecular Physics | Thermodynamics
Assuming energy wasn’t destroyed or created in this activity, why do you think the efficiency
isn’t 100%?
isn’t 100%?
Molecular Physics | Thermodynamics
Can palm oil be used as a thermometer substance? If yes explain why and if no explain why
Molecular Physics | Thermodynamics
your walk to your morning physics lecture takes 10 minutes and as you walk you do mechanical work at a rate of 33W with an efficiency of 6%. How much energy stored in your body ahve you used up over the course of your walk?
Molecular Physics | Thermodynamics
your walk to your morning physics lecture takes 10 minutes and as you walk you do mechanical work at a rate of 33W with an efficiency of 6%. How much energy stored in your body ahve you used up over the course of your walk?
Molecular Physics | Thermodynamics
On a cold winter morning when the temperature is -13 Celsius the air pressure in an aoutomobile tire is 1.5 atm.if the volume does not change what is the pressure after the tire has warmed to 15 Celsius
