What amount of heat is required to raise the temperature of 25 grams of copper to cause a 15ºc change? the specific heat of copper is 0.39 j/gºc.

146.25 J heat is require to cause the change of 15 °C.

Explanation:

Specific heat capacity:

It is the amount of heat required to raise the temperature of one gram of substance by one degree.

Formula:

Q = m × c × ΔT

Q = heat or energy in joule

m = mass of substance

c = specific heat of substance

ΔT = change in temperature

Given data:

Mass of copper = 25 g

Temperature change =ΔT= 15 °C

Specific heat of copper = 0.39 J/g.°C

Energy or joules require to increase the temperature Q = ?

Solution:

Q = m × c × ΔT

Q = 25 g × 0.39 J/g .°C × 15 °C

Q = 146.25 J

The answer is 150 J based on the math done in the other equation

Use the equation PV=nRT
- P is pressure in atm
- V is volume of gas in L
- R = 0.08206 L . atm/ mol . K
- T is temperature in K
Your equation should look like this: 
(1atm)(0.187L) = n (0.08206)(298K)
n=0.00765 mol O2 used per hour
Then, you have to convert from mol/hr to umol/s. Divide by 3600 (one hour is equal to 3600 seconds) and multiply by 1x10^6. 
Your answer should be 2.12 umol/s.