Question

Two liquids A and B are at temperatures of 75⁰C and 15⁰C. Their masses are in the ratio of 2 : 3 and their specific heats in the ratio 3 : 4. What is the resulting temperature?

• A. 90⁰C
• B. 70⁰C
• C. 35⁰C
• D. 60⁰C

Answer 1

Answer: (C)

35⁰C

Answer 2

T_mix = $\frac { \mathrm { m } _ { 1 } \mathrm {~s} _ { 1 } \mathrm {~T} _ { 1 } + \mathrm { m } _ { 2 } \mathrm {~s} _ { 2 } \mathrm {~T} _ { 2 } } { \mathrm {~m} _ { 1 } \mathrm {~s} _ { 1 } + \mathrm { m } _ { 2 } \mathrm {~s} _ { 2 } }$