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You use a thermometer, to measure the temperature. As a guide to know how much heat to apply, the temperature reading must be kept within a certain range, to be constant.
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What term is use to describe the amount of energy it takes for a certain amount of substances to be raised one degree in temperature is it specific heat specific gravity specific energy specific mass?
It is the Specific Heat Capacity.
What is the statement defining the relationship between the pressure and volume of a gas at constant temperature?
I'd use a graph showing an exponential decrease: as pressure increases, volume decreases.
When the pressure on a gas increases at constant temperature its volume?
decreases
Why latent heat is needed to change substance from solid to liquid?
Latent heat is required to be input to turn a solid to a liquid, or a liquid to a gas, and the reverse is true the other way. Thus when water is evaporated to water vapor, a fixed amount of heat must be supplied per kg of water evaporated, and similarly when water vapor condenses, the same amount of heat per kg is released. You can look up values of latent heat per kg in reference tables for different substances. Specific heat is not relevant to the phase change itself, as the phase change is isothermal (ie at a constant temperature). Specific heat is a way of defining for a substance how much heat is needed to change its temperature by one degree, relative to water which has a specific heat of 1, because we define the heat unit, calorie, as the heat required to raise 1 gram of water by 1 degC. Thus for other substances you take the specific heat (which will be quoted as a number relative to 1) and multiply by the change in temperature and the mass of substance to get the heat quantity in calories. Note that in SI units you will use kilograms rather than grams, the answer will then be in kilocalories which is a more useful quantity. In nutrition, when 'calories' are quoted, these are in fact kilocalories.
Why is air pumped through the chamber instead of just letting the fuel use the air that is present in a calorimeter?
Because water can absorb a lot of heat without significant changes in temperature, it can prevent change in the temperature, and therefore pressure, of the compressed air.To maintain a constant temperature, we again pass the compressed air through the same chambers, this time letting it take up heat from the water
What is the total heat energy supplied in isobaric process?
An isobaric process is one occurring at constant pressure (we are talking about gases). So the specific heat to use is Cp, the specific heat of the gas at constant pressure. To get the total heat energy you obviously need to also know the quantity of the gas involved, and the change in temperature.
What term is use to describe the amount of energy it takes for a certain amount of substances to be raised one degree in temperature is it specific heat specific gravity specific energy specific mass?
It is the Specific Heat Capacity.
Why you we use log mean temperature difference formula?
The use of the LMTD arises straightforwardly from the analysis of a heat exchanger with constant flow rate and fluid thermal properties. It is a simple method to approximated the temperature diving force in a heat exchanger. The LMTD is a logarithmic average of the temperature difference between the hot and cold streams at each end of the exchanger. The larger the LMTD, the more heat is transferred.
Can you use a charcoal starter to heat water tank?
A charcoal starter cannot readily be used to heat hot water tank as it produces far too little heat. A hot water tank requires several thousand BTU's of constant heat to bring the water up to temperature.
Why should you put the fin across gas side in heat exchanger application?
in my opinion because the gas is more efficient for trans heat to the material and we use the fins for icrease the heat transfer from the body to the surrounding and the gas will help for econtinuatioin heat transfer from the body because the gas not constant in its temperature and other properties
Why you use saturated steam in steam tracing?
If you use saturated steam, the main source of the heat is provided by the condensation of the steam at a constant temperature. The energy provided by the condensing steam is significantly more than what you can get from just changing the temperature of superheated steam. When the temperature remains constant, design calculations are also a lot easier; the temperatures stay the same (or almost the same) for the steam along the entire run and the pressure stays the same (or almost the same).
What is the statement defining the relationship between the pressure and volume of a gas at constant temperature?
I'd use a graph showing an exponential decrease: as pressure increases, volume decreases.
When the pressure on a gas increases at constant temperature its volume?
decreases
Why latent heat is needed to change substance from solid to liquid?
Latent heat is required to be input to turn a solid to a liquid, or a liquid to a gas, and the reverse is true the other way. Thus when water is evaporated to water vapor, a fixed amount of heat must be supplied per kg of water evaporated, and similarly when water vapor condenses, the same amount of heat per kg is released. You can look up values of latent heat per kg in reference tables for different substances. Specific heat is not relevant to the phase change itself, as the phase change is isothermal (ie at a constant temperature). Specific heat is a way of defining for a substance how much heat is needed to change its temperature by one degree, relative to water which has a specific heat of 1, because we define the heat unit, calorie, as the heat required to raise 1 gram of water by 1 degC. Thus for other substances you take the specific heat (which will be quoted as a number relative to 1) and multiply by the change in temperature and the mass of substance to get the heat quantity in calories. Note that in SI units you will use kilograms rather than grams, the answer will then be in kilocalories which is a more useful quantity. In nutrition, when 'calories' are quoted, these are in fact kilocalories.
Why is air pumped through the chamber instead of just letting the fuel use the air that is present in a calorimeter?
Because water can absorb a lot of heat without significant changes in temperature, it can prevent change in the temperature, and therefore pressure, of the compressed air.To maintain a constant temperature, we again pass the compressed air through the same chambers, this time letting it take up heat from the water
Suppose that 28 g of each of the following substances is initially at 27.0circ C What is the final temperature of each substance upon absorbing 2.45 kJ of heat?
We can answer this one of two ways. The first way we can do the experiment to a 'T' to find out the final temperature, or we can use the formula provided with our lab.
What can you use to keep ice from melting?
A vaccum flask,since it can the temperature of it's content constant.
