you need to know the specific heat capacity of aluminum first which can be denoted as 'c'.
then using the formula:
H=MC(dt) where 'dt; is the change in temperature, M is the mass and H is energy needed, you can thus calculate H.
i think the value of 'c' for aluminum is around 0.88Jg/K
Replace given values in the equation, you will surely get the answer!
334.8 Joules
Standard units of heat is Joules.
The amount of water whose temperature would change by 15 degrees Celsius when it absorbs 2646 joules of heat energy is 42,2g H2O.
Almost 90 % of electrical energy provided to an incandescent light bulb goes as heat and rest as light. A 100 Watt bulb puts out 100 Joules of heat per second. So - for one minute it would put out 6000 Joules (100 Watts X 60 seconds). 1 BTU (British Thermal Unit) of heat = 1055.056 Joules. So a 100 watt bulb, burning for one minute would put out 5.68 BTUs of heat. ( 6000 Joules / 1055.056 Joules) = 5.68 BTUs. Same bulb burning for one hour would generate 341 BTUs of heat.
-70 Joules
0.902 J/gC is the specific heat of aluminum. Use (q)heat(Joules) = mass * specific heat * change in temperature q = (480 g)(0.902 J/gC)(243 C - 23 C) = 95261.2 Joules ------------------------------( call it 9.5 X 104 Joules )
Specific heat of aluminum is 0.902 J/gC Use this formula. q(Joules) = mass * specific heat * change in temperature q = 106 grams Al * 0.902 J/gC *(121 C = 96 C) = 2390 Joules of heat
q( in Joules ) = mass * specific heat * change in temperature [ convert temps--Tf = Tc(1.80) + 32 ] q = (40 g)(0.90 J/gC)(61.1o C - 22.8o C) = 1.4 X 103 Joules =============
If all 1700 Joules of work get converted into heat, then, of course, you get 1700 Joules of heat.
Approx 4974 Joules.
Heat energy Q = mass x specific heat capacity x temperature change. Q = m*c*delta T Q = Joules m = kg c (aluminum) = 895.8 J/kg delta T = degr.C temp. change Answer: Q = (20/1000) x 895.8 x 5 = 89.58 Joules (Specific heat capacity of aluminum is obtained by multiplying its specific heat of 0.214 with c of water which is 4186 J/kg = 0.214 x 4186 = 895.8 J/kg).
103 joules
334.8 Joules
The unit for specific heat is Joules/g-Kelvin or it can be Joules/g-Celsius J= Joules g= Grams C= Celsius
Heat is measured in joules.
25 percent
25 percent