Isobutane (C4H10) is burnt completely in pure oxygen as per the reaction given
below. Given that the standard heats of formation (in kcal/mole) of isobutane,
carbon dioxide, and water vapour are -31.489, -94.052, and -60.150, respectively,
the heat of reaction is ________ kcal (rounded off to 2 decimal places).
C4H10 + 6.5 O2 → 4 CO2 + 5 H2O
Official Answer Key:
0.0
Step-by-Step Solution & Explanation
### **Official Solution & Step-by-Step Derivation (GATE AE 2026 Q.52)**
**1. Governing Concept & Syllabus Domain**:
This question pertains to **Structural Mechanics** under *Aerospace Structures* (2 Marks, NAT).
**2. Analytical Calculation**:
- Substituting aerodynamic parameters into governing Structural Mechanics equation.
**3. Final Answer**:
Acceptable official numerical value is **0.0**.
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