Explore BrainMass

# Temperature

### Heat and Temperature in Water

When heat is added to boiling water, what happens to its temperature and why?

### Dew point, Air temperature and Precipitation

In areas of precipitation, the dew point and air temperature are higher than in the surrounding areas not receiving rain. In areas of precipitation the dew point and air temperature are also the same or close to being the same. What can you say about the relationship between air temperature and the air's dew point for stations

### Temperature Chage Observed When Burning a Sample in Calorimeter

High-purity benzoic acid (C6H5COOH; DHcomb = -3227 kJ/mol) is a combustion standard for calibrating bomb calorimeters. A 1.221-g sample burns in a calorimeter (heat capacity = 1365 J/degC) that contains exactly 1.200 kg water. What temperature change is observed?

### {11.12}Steam at 100 degree C is added to ice at 0 degree C. The mass of the steam is 10.0kg and the mass of the ice is 50.0g. What is the final temperature of the mixture?The exhaust temperature of a Carnot heat engine is 350 degree C. What is the intake temperature if the efficiency is 25.0 percent?

Steam at 100 degree C is added to ice at 0 degree C. The mass of the steam is 10.0kg and the mass of the ice is 50.0g. What is the final temperature of the mixture? ================================================= Answers: a) 20.4 degree C b) 40.4 degree C c) 80.8 degree C d) 90.1 degree C ###########################

### Physics Problem: Solving for Temperature

Question: The exhaust temperature of a Carnot heat engine is 350 degree C. What is the intake temperature if the efficiency is 25.0 percent?

### Newton's Law of Cooling : Application to Falling Body Temperature

In a murder investigation, the crime scene investigators arrive 5am to examine the body. They found the body temperature to be 30 degrees celcius in a constant room temperature of 20 degrees celcius. (Normal body temperature is taken to be 37 degrees celcius). At 5.30 am the coroner arrived and measured the body temperature to

### Equilibrium Concentrations at a Certain Temperature and Pressure: Varying Reaction Coefficients

Please see the attached file for the fully formatted problem(s). Equilibrium Concentrations at a Certain Temperature and Pressure: Varying Reaction Coefficients 13.10. Peter, Paul, and Mary, members of a thermodynamics class, are asked to find the equilibrium composition at a particular T and P and for given initial amount

### What kind of relationship exists between emitted light and time

Certain crystals fluoresce when exposed to a short burst of ultraviolet light. The amount of light emitted by the crystals is both time and temperature dependent. The emitted light is maximum at the time of excitation, the output then decaying with time. Such materials can be used to measure temperature. Given are some relative

### Calculating Temperature Change in Water After a Reaction

10.1 g CaO is dropped into a styrofoam coffee cup containing 157 g H2O at 18.0 degrees C. If the following reaction occurs, then what temp will the water reach, assuming the cup is a perfect insulator and the cup absorbs only a negligible amount of heat? CaO(s) + H2O(l) yields Ca(OH)2(s) delta H rxn= -64.8 kJ/mol

### Design a cylinder to compress 68 degree Fahrenheit air

Design a cylinder to compress 68 degree farenheit air from atmospheric pressure to 200 psig without increasing the temperature more than 25 degrees farenheit. Show cylinder dimensions and discuss how far the piston must travel.

### Viscous fluid is moving through a flow pipe temperature increase

A viscous fluid is moving through a flow pipe. The flow is 2x10 to the -3 m3/s. Now, consider another tube with a fluid twice the viscosity which is moving in a pipe whose length is 3 times the original with a radius 1.5 times the original. The pressure difference across this new pipe is 1/3 that of the original. What is the f

### Surface tension of water and mercury: Effect of temperature

At 20 degrees celsius the surface tensions for water and mercury are 73dyn/cm and 470dyn/cm respectively. Find these values in SI units. A small capillary tube of 1mm diameter is placed into a container of 20 degree celsius water. will the level of the water in the tube move above or below the level of water? by what distance in

### Temperature of brick oven to expand 5mm without damage

A bottle containing 3kg of water at a temperature of 20 degrees Celsius is placed in a refrigerator where the temperature is kept at 3 degrees Celsius. How much heat is transferred from the water to cool it to 3 degrees Celsius?

### Temperature of brick oven to expand 5mm without damage,.,,

A brick oven 2 meters long at 20 degrees celsius is designed to allow for an expansion of 5mm without damage. To what temperature would the oven have to be heated to expand that much?

### brass rod pendulum loses time; find the error in one day.

See attached file. A clock driven by a brass rod pendulum loses time when the rod expands as the temperature rises. Find the error in one day. A pendulum clock is driven by a brass rod of length Lo= 1.6 meters, pivoted at one end. The pendulum beats perfect time when the temperature is to= 21 degrees Celsius. If the

### An aluminum and an iron bar are of unequal length; temperature at equal length.

An aluminum and an iron bar are of unequal length. An iron bar whose length is 60.00 meters is at 0 degrees Celsius. An aluminum bar whose length is 60.05 meters is at +10 degrees Celsius. Find a temperature at which they are the same length. The coefficient of expansion of iron is 11 E -6 per C degree. The coefficient of ex

### Calculate the final temperature after heat is added to a block of aluminum

A 2 kg block of aluminum is originally at 10 degrees C. If 140 kj of heat is added to the block, what is the final temperature in degrees C?

### Calculate the resulting temperature of water and aluminum in a calorimeter.

A 0.5kg mass of aluminum at 0 degrees Celsius is put in 1 kg of water at 78 degrees Celsius in a Calorimeter of negligible mass. What is the resulting temperature at equilibrium?

### Calculate final temperature of a gas undergoing an expansion in several ways.

A perfect gas occupying 0.2 cubic meters at a pressure of 1240 Kpa and a temp of 150 deg Celsius is expanded to 0.5 cubic meters. What is the final temp if the expansion takes place in the following ways: at constant pressure, Isothermally and according to the law pv^1.25=Constant?

### Rate Constant: How does it Change with a Decreasing Temperature

Question: For a certain reaction, the activation energy is 52.1 kJ/mole. By what ratio will the rate constant change if the temperature is decreased from 175 degrees Celsius to 75 degrees Celsius?

### Physics: Calculate the beat frequency in organ pipes.

Two pipes, equal in length, are each open at one end. Each has a fundamental frequency of 479 Hz at 18 C. In one pipe the air temperature is increased to 21 C. If the two pipes are sounded together, what beat frequency results?

### Mass Transfer: 21 Short Answer Questions

Please see the attached file for the fully formatted problem(s). 1. What happens to the rate of leaching with increase in temperature? 2. State some common problems of packed columns. 3. What types of towers are suitable for corrosive and foamy liquids? 4. Why plate towers are preferred to packed columns when large tempe

### Physics ideal gas law: Find air temperature inside the tires at end of a trip

At the start of a trip, a driver adjusts the absolute pressure in her tires to be 2.81 * 10^5 Pa when the outdoor temperature is 284K. At the end of the trip she measures the pressure to be 3.01 * 10^5 Pa. Ignoring the expansion of the tires, find the air temperature inside the tires at the end of the trip.

### Relationships between temperature, pressure and volume are depicted.

Does the pressure of a gas increase or decrease when its temperature is INCREASED but the volume is CONSTANT (like when you apply heat to a can of hair spray) and explain why. Ideas are expressed.

### Calculating the volume of an air bubble as it rises

An air bubble has a volume of 1.37 cm3 when it is released by a submarine 123 m below the surface of a lake. What is the volume of the bubble when it reaches the surface? Assume the air temperature in the bubble stays constant.

### Calculating a change in temperature given power, density, mass, dimensions, and specific heat capacities.

A class of 12 students taking an exam has a power output per student of 126 W. Assume that the initial temperature of the room is 19.5°C and that its dimensions are 6.20 m by 14.4 m by 3.30 m. What is the temperature (in °C, do not enter units) of the room at the end of 63.0 min if all the heat remains in the air in the room a

### Beat Frequency In Sound Pipes With Temperature Changes

Two pipes, equal in length, are each open at one end. Each has a fundamental frequency of 479 Hz at 18 C. In one pipe the air temperature is increased to 21 C. If the two pipes are sounded together, what beat frequency results?

### Specific heat, density, photon energy, wavelength characteristics

See attachment for problems. Chemistry review questions: specific heat, density, photon energy, wavelength characteristics, gas laws and unit conversion. 2. (4 points) Normal body temperature is 98.6°F. Calculate the temperature in a) Celsius b) Kelvin 4. (2 points) The specific heat of barium is 0.192 jo

### Calculating the final temperature of a substance undergoing a heat loss.

Commercial cold-packs consist of solid ammonium nitrate and water. Ammonium nitrate absorbs 330 J of heat per gram dissolved in water. In a coffee-cup calorimeter, 2.00 g of ammonium nitrate are dissolved in 75.0 g of water at 30 degrees Celsius. Assuming that all of the heat is lost from the water, what is the final temperatu

### Method to determine the surface temp of sun

Briefly describe the method to determine the surface temp of sun