Admin Table of Contents
How do you calculate the energy needed to heat an object?
Example
- change in temperature = (100 – 25) = 75.0°C.
- change in thermal energy = mass × specific heat capacity × change in temperature.
- = 0.200 × 4,180 × 75.0.
- = 62,700 J (62.7kJ)
How do you calculate the amount of heat required?
We wish to determine the value of Q – the quantity of heat. To do so, we would use the equation Q = m•C•ΔT. The m and the C are known; the ΔT can be determined from the initial and final temperature.
What does C stand for in MCAT?
c = specific heat (units J/kg∙K)
How much heat does it take to raise the temperature?
Take a look at the specific heat of water. As you know, a substance’s specific heat tells you how much heat is needed in order to increase the temperature of 1 g of that substance by 1∘C. In water’s case, you need to provide 4.18 J of heat per gram of water to increase its temperature by 1∘C.
What is the total heat required to boil 45g of water?
The answer is 116 kJ. You need to go through two stages in order to find the total heat required to completely boil 45.0 g of water. First, you must provide enough heat to get the water to 100∘C. Then, you must provide enough heat to get all the water from liquid to steam. This is calculated using water’s enthalpy of vaporization,…
What is the specific heat capacity of a substance?
Specific heat capacity is measured in J/kg K or J/kg C, as it is the heat or energy required during a constant volume process to change the temperature of a substance of unit mass by 1 °C or 1 °K. What is the specific heat capacity value of water?
What is the energy required to heat a 500g aluminum sheet?
You can use this value to estimate the energy required to heat a 500 g of aluminum by 5 °C, i.e., Q = m x Cp x ΔT = 0.5 * 897* 5 = 2242.5 J.