Question

How much heat is required to raise the temperature of 1,500 g of water from 25°C to 52°C? The specific heat of water is 4.184 J/g-oC.

Answer 1

heat required: 169452 Joules

• use the formula, Q = mcΔT

Q is heat required, m is mass in kg, c is s.h.c , ΔT is change in temperature

• Here, the units of s.p.c and mass matches, in grams
• if did not match, we have to convert into specific unit.

↪ Q = 1500 * 4.184 * (52-25)

↪ Q = 169452 J

Answer 2

• Mass=1500g=m
• ∆T=52-25=27°C
• Specific heat capacity=c=4.184J/g°C

Apply thermodynamics

$\\ \rm\rightarrowtail Q=mc\delta T$

• Q is heat

$\\ \rm\rightarrowtail Q=1500(4.184)(27)$

$\\ \rm\rightarrowtail Q=169452J$