lesson 11 specific heat capacity practicak Flashcards
what is the rearranged equation for specific heat capacity
c = ∆E / m∆θ
how can we reduce thermal energy passing out of the beaker going into the air
(Sources of inaccuracy)
by using an insulator with lower thermal conductivity
What to do if not all the thermal energy passes into the oil
(sources of inaccuracy)
to ensure the immersion heater is fully submerged
what if there’s an incorrect reading of the thermometer
(sources of inaccuracy)
use an electronic temperature probe
how can we reduce thermal energy which is not being spread through the oil
(sources of inaccuracy)
by stirring the oil
what’s the first step in the SHC practical
(with vegetable oil)
place a beaker on a balance and press zero
what’s step 2 of SHC practical
(with vegetable oil)
add the boil to the beaker and record the mass of the oil
what’s step 3 of SHC practical
(with vegetable oil)
place a thermometer and immersion heater in the oil
what’s step 4 of SHC practical
(with vegetable oil)
read the starting temperature of the oil
what’s step 5 of SHC practical
(with vegetable oil)
wrap the beaker in insulating foam to reduce thermal energy transfer to the surroundings
what’s step 6 of SHC practical
(with vegetable oil)
connect a joulemeter and power pack to the immersion heater
what does the joule meter tell us
how many joules of electrical energy pass into the immersion heater
what’s step 7 of SHC practical
(with vegetable oil)
leave it for 30 minutes
as it will allow the temperature to rise enough so we can accurately read it on the thermometer
what’s the last step of SHC practical
(with vegetable oil)
read the number of joules of energy that passed into the immersion heater
and read the final temperature of the oil
