how much heat is required to raise the temp of 96.7g pci3 from 31.7c to 69.2c?spefic heat ispci3 0.874j/g.c?

Answer 1

Multiply the mass times the specific heat times the change of temperature and thank the people who gave you an actual answer rather than calculating it for yourself. They will not be there to take your exam - neither will I.

Q = 96.7 g * 0.874 j / g * C * (69.2 - 31.7)C
Q = 3,169.43 j or 3.169 kJ

Answer 2

Temperature rise=69.2-31.7=37.5 degrees. To raise 1 g of pci3 whatever that is by this amount requires 37.5x0.874=32.775 joules of heat, so to raise the temp. of 96.7g requires 32.775x96.7=3169.3425 joules.

Answer 3

temperature change is: 69.2-31.7=37.5 degrees
96.7g*37.5 degrees*.874 J/g-degree=3169 J